Discussion:
[PATCH 3.12 100/175] pinctrl: sunxi: use chained_irq_{enter, exit} for GIC compatibility
(too old to reply)
Jiri Slaby
2014-03-22 10:43:49 UTC
Permalink
From: Chen-Yu Tsai <***@csie.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 905a5117e79367b7e58ae046d12ca9961f048c89 upstream.

On tha Allwinner A20 SoC, the external interrupts on the pin controller
device are connected to the GIC. Without chained_irq_{enter, exit},
external GPIO interrupts, such as used by mmc core card detect, cause
the system to hang.

This issue was first encountered during my attempt to get out-of-band
interrupts for WiFi on the Cubietruck working. With David's new series
of sunci-mci using mmc slot-gpio for (GPIO interrupt based) card
detection, removing the SD card also causes my Cubietruck to hang. This
problem should extend to all Allwinner A20 based boards.

With this fix, the system no longer hangs when I remove or insert the
SD card. /proc/interrupts show that the interrupt has correctly fired.
However the system still does not detect card removal/insertion. I
believe this is another unrelated issue.

Signed-off-by: Chen-Yu Tsai <***@csie.org>
Acked-by: Maxime Ripard <***@free-electrons.com>
Signed-off-by: Linus Walleij <***@linaro.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/pinctrl/pinctrl-sunxi.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-sunxi.c b/drivers/pinctrl/pinctrl-sunxi.c
index 6ebf3067bde4..b2dcde123e56 100644
--- a/drivers/pinctrl/pinctrl-sunxi.c
+++ b/drivers/pinctrl/pinctrl-sunxi.c
@@ -14,6 +14,7 @@
#include <linux/clk.h>
#include <linux/gpio.h>
#include <linux/irqdomain.h>
+#include <linux/irqchip/chained_irq.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
@@ -665,6 +666,7 @@ static struct irq_chip sunxi_pinctrl_irq_chip = {

static void sunxi_pinctrl_irq_handler(unsigned irq, struct irq_desc *desc)
{
+ struct irq_chip *chip = irq_get_chip(irq);
struct sunxi_pinctrl *pctl = irq_get_handler_data(irq);
const unsigned long reg = readl(pctl->membase + IRQ_STATUS_REG);

@@ -674,10 +676,12 @@ static void sunxi_pinctrl_irq_handler(unsigned irq, struct irq_desc *desc)
if (reg) {
int irqoffset;

+ chained_irq_enter(chip, desc);
for_each_set_bit(irqoffset, &reg, SUNXI_IRQ_NUMBER) {
int pin_irq = irq_find_mapping(pctl->domain, irqoffset);
generic_handle_irq(pin_irq);
}
+ chained_irq_exit(chip, desc);
}
}
--
1.9.0
Jiri Slaby
2014-03-22 10:47:00 UTC
Permalink
From: Felipe Contreras <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit b4cb9244a544a1623305eb58267a90418268d31e upstream.

More people have reported they need this for their machines to work
correctly.

References: https://bugzilla.kernel.org/show_bug.cgi?id=60682
Reported-by: Stefan Hellermann <***@the2masters.de>
Reported-by: Benedikt Sauer <***@gmail.com>
Reported-by: Erno Kuusela <***@iki.fi>
Reported-by: Jonathan Doman <***@gmail.com>
Reported-by: Christoph Klaffl <***@gmail.com>
Reported-by: Jan Hendrik Nielsen <***@informatik.hu-berlin.de>
Signed-off-by: Felipe Contreras <***@gmail.com>
Signed-off-by: Rafael J. Wysocki <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/acpi/blacklist.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)

diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index 9515f18898b2..f37dec579712 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -297,6 +297,54 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
DMI_MATCH(DMI_PRODUCT_VERSION, "3259A2G"),
},
},
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "ThinkPad Edge E530",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "3259CTO"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "ThinkPad Edge E530",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "3259HJG"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "Acer Aspire V5-573G",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer Aspire"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "V5-573G/Dazzle_HW"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "Acer Aspire V5-572G",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer Aspire"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "V5-572G/Dazzle_CX"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "ThinkPad T431s",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "20AACTO1WW"),
+ },
+ },
+ {
+ .callback = dmi_disable_osi_win8,
+ .ident = "ThinkPad T430",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "2349D15"),
+ },
+ },

/*
* BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
--
1.9.0
Jiri Slaby
2014-03-22 10:47:01 UTC
Permalink
From: Hendrik Brueckner <***@linux.vnet.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit d1e61fe49fd450be15d402ac353784f5ba8a624e upstream.

Unloading the fs3270 kernel module does not remove the created
"3270/tub" device. Reloading the module then causes a sysfs warning:
"sysfs: cannot create duplicate filename '/devices/virtual/3270/3270!tub'".

Call device_destroy() in the module exit function to solve this issue.

Signed-off-by: Hendrik Brueckner <***@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <***@de.ibm.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/s390/char/fs3270.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index f93cc32eb818..71e974738014 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -564,6 +564,7 @@ static void __exit
fs3270_exit(void)
{
raw3270_unregister_notifier(&fs3270_notifier);
+ device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, 0));
__unregister_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270");
}
--
1.9.0
Jiri Slaby
2014-03-22 10:47:04 UTC
Permalink
From: Gerald Schaefer <***@de.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit b7c5b1aa2836c933ab03f90391619ebdc9112e46 upstream.

Commit 27f6b416 "s390/vtimer: rework virtual timer interface" removed
the call to init_virt_timer() by mistake, which is added again by this
patch.

Signed-off-by: Gerald Schaefer <***@de.ibm.com>
Signed-off-by: Martin Schwidefsky <***@de.ibm.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/s390/appldata/appldata_base.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index 87a22092b68f..6c0281f30d44 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -527,6 +527,7 @@ static int __init appldata_init(void)
{
int rc;

+ init_virt_timer(&appldata_timer);
appldata_timer.function = appldata_timer_function;
appldata_timer.data = (unsigned long) &appldata_work;
--
1.9.0
Jiri Slaby
2014-03-22 10:47:03 UTC
Permalink
From: Martin Schwidefsky <***@de.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 8adbf78ec4839c1dc4ff20c9a1f332a7bc99e6e6 upstream.

Git commit 4f37a68cdaf6dea833cfdded2a3e0c47c0f006da
"s390: Use direct ktime path for s390 clockevent device" makes use
of the CLOCK_EVT_FEAT_KTIME clockevent option to avoid the delta
calculation with ktime_get() in clockevents_program_event and the
get_tod_clock() in s390_next_event. This is based on the assumption
that the difference between the internal ktime and the hardware
clock is reflected in the wall_to_monotonic delta. But this is not
true, the ntp corrections are applied via changes to the tk->mult
multiplier and this is not reflected in wall_to_monotonic.

In theory this could be solved by using the raw monotonic clock
but it is simpler to switch back to the standard clock delta
calculation.

Signed-off-by: Martin Schwidefsky <***@de.ibm.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/s390/kernel/time.c | 19 ++++---------------
1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 60a508a9b981..dd95f1631621 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -108,20 +108,10 @@ static void fixup_clock_comparator(unsigned long long delta)
set_clock_comparator(S390_lowcore.clock_comparator);
}

-static int s390_next_ktime(ktime_t expires,
+static int s390_next_event(unsigned long delta,
struct clock_event_device *evt)
{
- struct timespec ts;
- u64 nsecs;
-
- ts.tv_sec = ts.tv_nsec = 0;
- monotonic_to_bootbased(&ts);
- nsecs = ktime_to_ns(ktime_add(timespec_to_ktime(ts), expires));
- do_div(nsecs, 125);
- S390_lowcore.clock_comparator = sched_clock_base_cc + (nsecs << 9);
- /* Program the maximum value if we have an overflow (== year 2042) */
- if (unlikely(S390_lowcore.clock_comparator < sched_clock_base_cc))
- S390_lowcore.clock_comparator = -1ULL;
+ S390_lowcore.clock_comparator = get_tod_clock() + delta;
set_clock_comparator(S390_lowcore.clock_comparator);
return 0;
}
@@ -146,15 +136,14 @@ void init_cpu_timer(void)
cpu = smp_processor_id();
cd = &per_cpu(comparators, cpu);
cd->name = "comparator";
- cd->features = CLOCK_EVT_FEAT_ONESHOT |
- CLOCK_EVT_FEAT_KTIME;
+ cd->features = CLOCK_EVT_FEAT_ONESHOT;
cd->mult = 16777;
cd->shift = 12;
cd->min_delta_ns = 1;
cd->max_delta_ns = LONG_MAX;
cd->rating = 400;
cd->cpumask = cpumask_of(cpu);
- cd->set_next_ktime = s390_next_ktime;
+ cd->set_next_event = s390_next_event;
cd->set_mode = s390_set_mode;

clockevents_register_device(cd);
--
1.9.0
Jiri Slaby
2014-03-22 10:47:07 UTC
Permalink
From: Anssi Hannula <***@iki.fi>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 11f7c52d90b21a51b0bc6a8b642c6ed150bdc219 upstream.

hdmi_manual_setup_channel_mapping() and hdmi_std_setup_channel_mapping
try to assign ALSA channels to HDMI channel slots and disable (i.e.
silence) other slots.

However, they try to disable a slot by using AC_VERB_SET_CHAN_SLOT with
parameter ((alsa_ch << 8) | 0xf), while the correct parameter is
((0xf << 8) | hdmi_slot), i.e. the slot should be unassigned, not the
ALSA channel.

Fix that by actually disabling the unused slots.

Note that this bug did not cause any (reported) issues because slots
incorrectly having audio are normally ignored by a receiver if the CEA
channel allocation used does not map that slot to any speaker.
Additionally, the converter channel count configuration limits the
number of actually active channels in any case.

Signed-off-by: Anssi Hannula <***@iki.fi>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 29 +++++++++++++++++++----------
1 file changed, 19 insertions(+), 10 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 22f6376f724b..eef388f4d1cd 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -635,9 +635,9 @@ static void hdmi_std_setup_channel_mapping(struct hda_codec *codec,

if (non_pcm) {
for (i = 0; i < ch_alloc->channels; i++)
- non_pcm_mapping[i] = i | (i << 4);
+ non_pcm_mapping[i] = (i << 4) | i;
for (; i < 8; i++)
- non_pcm_mapping[i] = 0xf | (i << 4);
+ non_pcm_mapping[i] = (0xf << 4) | i;
}

for (i = 0; i < 8; i++) {
@@ -691,7 +691,7 @@ static int to_cea_slot(unsigned char c)
if (t->map == c)
return t->cea_slot;
}
- return 0x0f;
+ return -1;
}

/* from CEA slot to ALSA API channel position */
@@ -744,14 +744,23 @@ static int hdmi_manual_setup_channel_mapping(struct hda_codec *codec,
hda_nid_t pin_nid,
int chs, unsigned char *map)
{
- int i;
- for (i = 0; i < 8; i++) {
+ int alsa_pos, hdmi_slot;
+ int assignments[8] = {[0 ... 7] = 0xf};
+
+ for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) {
+
+ hdmi_slot = to_cea_slot(map[alsa_pos]);
+
+ if (hdmi_slot < 0)
+ continue; /* unassigned channel */
+
+ assignments[hdmi_slot] = alsa_pos;
+ }
+
+ for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) {
int val, err;
- if (i < chs)
- val = to_cea_slot(map[i]);
- else
- val = 0xf;
- val |= (i << 4);
+
+ val = (assignments[hdmi_slot] << 4) | hdmi_slot;
err = snd_hda_codec_write(codec, pin_nid, 0,
AC_VERB_SET_HDMI_CHAN_SLOT, val);
if (err)
--
1.9.0
Jiri Slaby
2014-03-22 10:47:06 UTC
Permalink
From: Anssi Hannula <***@iki.fi>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1df5a06abbaa876ecc01ea84064cdffb4f52a1a1 upstream.

Currently the converter channel count is set to the number of actual
input channels. The audio infoframe channel count field is set
similarly.

However, sometimes the used channel map does not map all input channels
to outputs. Notably, 3 channel modes (e.g. 2.1) require a dummy input
channel so there are 4 input channels. According to the HDA
specification, converter channel count should be programmed according to
the number of _active_ channels.

On Intel HDMI codecs (but not on NVIDIA), setting the converter channel
to a higher value than there are actually mapped channels to HDMI slots
will cause no audio to be output at all.

Note that the effects of this issue are currently partially masked by
other bugs that prevent the driver from actually unmapping channels in
certain cases. For example, if a 4 channel stream is first created and
prepared, it gets a FL,FR,RL,RR mapping (ALSA->HDMI slot mapping 0->0,
1->1, 2->4, 3->5). If one thereafter assigns a FR,FL,FC mapping to it,
the driver will remap 2->3 but fail to unmap 2->4 and 3->5, so there are
still 4 active channels and the issue will not trigger in this case.
These bugs will be fixed separately.

Fix the channel counts in the converter channel count field and in the
audio infoframe channel count field to match the actual number of active
channels.

Signed-off-by: Anssi Hannula <***@iki.fi>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 3b9002e00f30..22f6376f724b 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -63,6 +63,7 @@ struct hdmi_spec_per_pin {
hda_nid_t pin_nid;
int num_mux_nids;
hda_nid_t mux_nids[HDA_MAX_CONNECTIONS];
+ hda_nid_t cvt_nid;

struct hda_codec *codec;
struct hdmi_eld sink_eld;
@@ -913,8 +914,9 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
{
hda_nid_t pin_nid = per_pin->pin_nid;
int channels = per_pin->channels;
+ int active_channels;
struct hdmi_eld *eld;
- int ca;
+ int ca, ordered_ca;
union audio_infoframe ai;

if (!channels)
@@ -936,6 +938,11 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
if (ca < 0)
ca = 0;

+ ordered_ca = get_channel_allocation_order(ca);
+ active_channels = channel_allocations[ordered_ca].channels;
+
+ hdmi_set_channel_count(codec, per_pin->cvt_nid, active_channels);
+
memset(&ai, 0, sizeof(ai));
if (eld->info.conn_type == 0) { /* HDMI */
struct hdmi_audio_infoframe *hdmi_ai = &ai.hdmi;
@@ -943,7 +950,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
hdmi_ai->type = 0x84;
hdmi_ai->ver = 0x01;
hdmi_ai->len = 0x0a;
- hdmi_ai->CC02_CT47 = channels - 1;
+ hdmi_ai->CC02_CT47 = active_channels - 1;
hdmi_ai->CA = ca;
hdmi_checksum_audio_infoframe(hdmi_ai);
} else if (eld->info.conn_type == 1) { /* DisplayPort */
@@ -952,7 +959,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
dp_ai->type = 0x84;
dp_ai->len = 0x1b;
dp_ai->ver = 0x11 << 2;
- dp_ai->CC02_CT47 = channels - 1;
+ dp_ai->CC02_CT47 = active_channels - 1;
dp_ai->CA = ca;
} else {
snd_printd("HDMI: unknown connection type at pin %d\n",
@@ -978,7 +985,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
snd_printdd("hdmi_setup_audio_infoframe: "
"pin=%d channels=%d\n",
pin_nid,
- channels);
+ active_channels);
hdmi_stop_infoframe_trans(codec, pin_nid);
hdmi_fill_audio_infoframe(codec, pin_nid,
ai.bytes, sizeof(ai));
@@ -1241,6 +1248,7 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
per_cvt = get_cvt(spec, cvt_idx);
/* Claim converter */
per_cvt->assigned = 1;
+ per_pin->cvt_nid = per_cvt->cvt_nid;
hinfo->nid = per_cvt->cvt_nid;

snd_hda_codec_write_cache(codec, per_pin->pin_nid, 0,
@@ -1564,8 +1572,6 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
per_pin->channels = substream->runtime->channels;
per_pin->setup = true;

- hdmi_set_channel_count(codec, cvt_nid, substream->runtime->channels);
-
hdmi_setup_audio_infoframe(codec, per_pin, non_pcm);

if (spec->dyn_pin_out) {
--
1.9.0
Jiri Slaby
2014-03-22 10:47:08 UTC
Permalink
From: Anssi Hannula <***@iki.fi>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit a5b7d510b2220cccbcaeb1b87a6d8c47efeb154c upstream.

For some speakers and slots the CEA slot <-> speaker assignment depends
on the used CEA Channel Allocation value.

Therefore the from_cea_slot() and to_cea_slot() helpers currently only
work correctly for the regular 7.1 speakers.

Fix them to work with all speakers, taking the re-ordered CA index as
input and adapting use sites accordingly.

This change allows manual channel mapping to actually work for all CEA
allocated speakers. Additionally, this fixes incorrect channel map
reporting in automatic channel mapping mode when an affected speaker
position is used (e.g. 6.1 map which contains an RC speaker).

Signed-off-by: Anssi Hannula <***@iki.fi>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 70 +++++++++++++++++++++++++++-------------------
1 file changed, 41 insertions(+), 29 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index eef388f4d1cd..57bc1fe010ba 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -656,19 +656,27 @@ static void hdmi_std_setup_channel_mapping(struct hda_codec *codec,

struct channel_map_table {
unsigned char map; /* ALSA API channel map position */
- unsigned char cea_slot; /* CEA slot value */
int spk_mask; /* speaker position bit mask */
};

static struct channel_map_table map_tables[] = {
- { SNDRV_CHMAP_FL, 0x00, FL },
- { SNDRV_CHMAP_FR, 0x01, FR },
- { SNDRV_CHMAP_RL, 0x04, RL },
- { SNDRV_CHMAP_RR, 0x05, RR },
- { SNDRV_CHMAP_LFE, 0x02, LFE },
- { SNDRV_CHMAP_FC, 0x03, FC },
- { SNDRV_CHMAP_RLC, 0x06, RLC },
- { SNDRV_CHMAP_RRC, 0x07, RRC },
+ { SNDRV_CHMAP_FL, FL },
+ { SNDRV_CHMAP_FR, FR },
+ { SNDRV_CHMAP_RL, RL },
+ { SNDRV_CHMAP_RR, RR },
+ { SNDRV_CHMAP_LFE, LFE },
+ { SNDRV_CHMAP_FC, FC },
+ { SNDRV_CHMAP_RLC, RLC },
+ { SNDRV_CHMAP_RRC, RRC },
+ { SNDRV_CHMAP_RC, RC },
+ { SNDRV_CHMAP_FLC, FLC },
+ { SNDRV_CHMAP_FRC, FRC },
+ { SNDRV_CHMAP_FLH, FLH },
+ { SNDRV_CHMAP_FRH, FRH },
+ { SNDRV_CHMAP_FLW, FLW },
+ { SNDRV_CHMAP_FRW, FRW },
+ { SNDRV_CHMAP_TC, TC },
+ { SNDRV_CHMAP_FCH, FCH },
{} /* terminator */
};

@@ -684,25 +692,19 @@ static int to_spk_mask(unsigned char c)
}

/* from ALSA API channel position to CEA slot */
-static int to_cea_slot(unsigned char c)
+static int to_cea_slot(int ordered_ca, unsigned char pos)
{
- struct channel_map_table *t = map_tables;
- for (; t->map; t++) {
- if (t->map == c)
- return t->cea_slot;
- }
- return -1;
-}
+ int mask = to_spk_mask(pos);
+ int i;

-/* from CEA slot to ALSA API channel position */
-static int from_cea_slot(unsigned char c)
-{
- struct channel_map_table *t = map_tables;
- for (; t->map; t++) {
- if (t->cea_slot == c)
- return t->map;
+ if (mask) {
+ for (i = 0; i < 8; i++) {
+ if (channel_allocations[ordered_ca].speakers[7 - i] == mask)
+ return i;
+ }
}
- return 0;
+
+ return -1;
}

/* from speaker bit mask to ALSA API channel position */
@@ -716,6 +718,14 @@ static int spk_to_chmap(int spk)
return 0;
}

+/* from CEA slot to ALSA API channel position */
+static int from_cea_slot(int ordered_ca, unsigned char slot)
+{
+ int mask = channel_allocations[ordered_ca].speakers[7 - slot];
+
+ return spk_to_chmap(mask);
+}
+
/* get the CA index corresponding to the given ALSA API channel map */
static int hdmi_manual_channel_allocation(int chs, unsigned char *map)
{
@@ -742,14 +752,16 @@ static int hdmi_manual_channel_allocation(int chs, unsigned char *map)
/* set up the channel slots for the given ALSA API channel map */
static int hdmi_manual_setup_channel_mapping(struct hda_codec *codec,
hda_nid_t pin_nid,
- int chs, unsigned char *map)
+ int chs, unsigned char *map,
+ int ca)
{
+ int ordered_ca = get_channel_allocation_order(ca);
int alsa_pos, hdmi_slot;
int assignments[8] = {[0 ... 7] = 0xf};

for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) {

- hdmi_slot = to_cea_slot(map[alsa_pos]);
+ hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]);

if (hdmi_slot < 0)
continue; /* unassigned channel */
@@ -776,7 +788,7 @@ static void hdmi_setup_fake_chmap(unsigned char *map, int ca)
int ordered_ca = get_channel_allocation_order(ca);
for (i = 0; i < 8; i++) {
if (i < channel_allocations[ordered_ca].channels)
- map[i] = from_cea_slot(hdmi_channel_mapping[ca][i] & 0x0f);
+ map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f);
else
map[i] = 0;
}
@@ -789,7 +801,7 @@ static void hdmi_setup_channel_mapping(struct hda_codec *codec,
{
if (!non_pcm && chmap_set) {
hdmi_manual_setup_channel_mapping(codec, pin_nid,
- channels, map);
+ channels, map, ca);
} else {
hdmi_std_setup_channel_mapping(codec, pin_nid, non_pcm, ca);
hdmi_setup_fake_chmap(map, ca);
--
1.9.0
Jiri Slaby
2014-03-22 10:47:02 UTC
Permalink
From: Martin Schwidefsky <***@de.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 79c74ecbebf76732f91b82a62ce7fc8a88326962 upstream.

Switch to the improved update_vsyscall interface that provides
sub-nanosecond precision for gettimeofday and clock_gettime.

Signed-off-by: Martin Schwidefsky <***@de.ibm.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/s390/Kconfig | 2 +-
arch/s390/include/asm/vdso.h | 5 +++--
arch/s390/kernel/asm-offsets.c | 3 ++-
arch/s390/kernel/time.c | 27 ++++++++++++++++++---------
arch/s390/kernel/vdso32/clock_gettime.S | 30 ++++++++++++++++--------------
arch/s390/kernel/vdso32/gettimeofday.S | 9 +++++----
arch/s390/kernel/vdso64/clock_gettime.S | 22 ++++++++++++----------
arch/s390/kernel/vdso64/gettimeofday.S | 9 +++++----
8 files changed, 62 insertions(+), 45 deletions(-)

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 7143793859fa..3e01afa21710 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -100,7 +100,7 @@ config S390
select GENERIC_CLOCKEVENTS
select GENERIC_CPU_DEVICES if !SMP
select GENERIC_SMP_IDLE_THREAD
- select GENERIC_TIME_VSYSCALL_OLD
+ select GENERIC_TIME_VSYSCALL
select HAVE_ALIGNED_STRUCT_PAGE if SLUB
select HAVE_ARCH_JUMP_LABEL if !MARCH_G5
select HAVE_ARCH_SECCOMP_FILTER
diff --git a/arch/s390/include/asm/vdso.h b/arch/s390/include/asm/vdso.h
index a73eb2e1e918..bc9746a7d47c 100644
--- a/arch/s390/include/asm/vdso.h
+++ b/arch/s390/include/asm/vdso.h
@@ -26,8 +26,9 @@ struct vdso_data {
__u64 wtom_clock_nsec; /* 0x28 */
__u32 tz_minuteswest; /* Minutes west of Greenwich 0x30 */
__u32 tz_dsttime; /* Type of dst correction 0x34 */
- __u32 ectg_available;
- __u32 ntp_mult; /* NTP adjusted multiplier 0x3C */
+ __u32 ectg_available; /* ECTG instruction present 0x38 */
+ __u32 tk_mult; /* Mult. used for xtime_nsec 0x3c */
+ __u32 tk_shift; /* Shift used for xtime_nsec 0x40 */
};

struct vdso_per_cpu_data {
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 2416138ebd3e..496116cd65ec 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -65,7 +65,8 @@ int main(void)
DEFINE(__VDSO_WTOM_NSEC, offsetof(struct vdso_data, wtom_clock_nsec));
DEFINE(__VDSO_TIMEZONE, offsetof(struct vdso_data, tz_minuteswest));
DEFINE(__VDSO_ECTG_OK, offsetof(struct vdso_data, ectg_available));
- DEFINE(__VDSO_NTP_MULT, offsetof(struct vdso_data, ntp_mult));
+ DEFINE(__VDSO_TK_MULT, offsetof(struct vdso_data, tk_mult));
+ DEFINE(__VDSO_TK_SHIFT, offsetof(struct vdso_data, tk_shift));
DEFINE(__VDSO_ECTG_BASE, offsetof(struct vdso_per_cpu_data, ectg_timer_base));
DEFINE(__VDSO_ECTG_USER, offsetof(struct vdso_per_cpu_data, ectg_user_time));
/* constants used by the vdso */
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 064c3082ab33..60a508a9b981 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -221,21 +221,30 @@ struct clocksource * __init clocksource_default_clock(void)
return &clocksource_tod;
}

-void update_vsyscall_old(struct timespec *wall_time, struct timespec *wtm,
- struct clocksource *clock, u32 mult)
+void update_vsyscall(struct timekeeper *tk)
{
- if (clock != &clocksource_tod)
+ u64 nsecps;
+
+ if (tk->clock != &clocksource_tod)
return;

/* Make userspace gettimeofday spin until we're done. */
++vdso_data->tb_update_count;
smp_wmb();
- vdso_data->xtime_tod_stamp = clock->cycle_last;
- vdso_data->xtime_clock_sec = wall_time->tv_sec;
- vdso_data->xtime_clock_nsec = wall_time->tv_nsec;
- vdso_data->wtom_clock_sec = wtm->tv_sec;
- vdso_data->wtom_clock_nsec = wtm->tv_nsec;
- vdso_data->ntp_mult = mult;
+ vdso_data->xtime_tod_stamp = tk->clock->cycle_last;
+ vdso_data->xtime_clock_sec = tk->xtime_sec;
+ vdso_data->xtime_clock_nsec = tk->xtime_nsec;
+ vdso_data->wtom_clock_sec =
+ tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
+ vdso_data->wtom_clock_nsec = tk->xtime_nsec +
+ + (tk->wall_to_monotonic.tv_nsec << tk->shift);
+ nsecps = (u64) NSEC_PER_SEC << tk->shift;
+ while (vdso_data->wtom_clock_nsec >= nsecps) {
+ vdso_data->wtom_clock_nsec -= nsecps;
+ vdso_data->wtom_clock_sec++;
+ }
+ vdso_data->tk_mult = tk->mult;
+ vdso_data->tk_shift = tk->shift;
smp_wmb();
++vdso_data->tb_update_count;
}
diff --git a/arch/s390/kernel/vdso32/clock_gettime.S b/arch/s390/kernel/vdso32/clock_gettime.S
index b2224e0b974c..5be8e472f57d 100644
--- a/arch/s390/kernel/vdso32/clock_gettime.S
+++ b/arch/s390/kernel/vdso32/clock_gettime.S
@@ -38,25 +38,26 @@ __kernel_clock_gettime:
sl %r1,__VDSO_XTIME_STAMP+4(%r5)
brc 3,2f
ahi %r0,-1
-2: ms %r0,__VDSO_NTP_MULT(%r5) /* cyc2ns(clock,cycle_delta) */
+2: ms %r0,__VDSO_TK_MULT(%r5) /* * tk->mult */
lr %r2,%r0
- l %r0,__VDSO_NTP_MULT(%r5)
+ l %r0,__VDSO_TK_MULT(%r5)
ltr %r1,%r1
mr %r0,%r0
jnm 3f
- a %r0,__VDSO_NTP_MULT(%r5)
+ a %r0,__VDSO_TK_MULT(%r5)
3: alr %r0,%r2
- srdl %r0,12
- al %r0,__VDSO_XTIME_NSEC(%r5) /* + xtime */
+ al %r0,__VDSO_XTIME_NSEC(%r5) /* + tk->xtime_nsec */
al %r1,__VDSO_XTIME_NSEC+4(%r5)
brc 12,4f
ahi %r0,1
-4: l %r2,__VDSO_XTIME_SEC+4(%r5)
- al %r0,__VDSO_WTOM_NSEC(%r5) /* + wall_to_monotonic */
+4: al %r0,__VDSO_WTOM_NSEC(%r5) /* + wall_to_monotonic.nsec */
al %r1,__VDSO_WTOM_NSEC+4(%r5)
brc 12,5f
ahi %r0,1
-5: al %r2,__VDSO_WTOM_SEC+4(%r5)
+5: l %r2,__VDSO_TK_SHIFT(%r5) /* Timekeeper shift */
+ srdl %r0,0(%r2) /* >> tk->shift */
+ l %r2,__VDSO_XTIME_SEC+4(%r5)
+ al %r2,__VDSO_WTOM_SEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 1b
basr %r5,0
@@ -86,20 +87,21 @@ __kernel_clock_gettime:
sl %r1,__VDSO_XTIME_STAMP+4(%r5)
brc 3,12f
ahi %r0,-1
-12: ms %r0,__VDSO_NTP_MULT(%r5) /* cyc2ns(clock,cycle_delta) */
+12: ms %r0,__VDSO_TK_MULT(%r5) /* * tk->mult */
lr %r2,%r0
- l %r0,__VDSO_NTP_MULT(%r5)
+ l %r0,__VDSO_TK_MULT(%r5)
ltr %r1,%r1
mr %r0,%r0
jnm 13f
- a %r0,__VDSO_NTP_MULT(%r5)
+ a %r0,__VDSO_TK_MULT(%r5)
13: alr %r0,%r2
- srdl %r0,12
- al %r0,__VDSO_XTIME_NSEC(%r5) /* + xtime */
+ al %r0,__VDSO_XTIME_NSEC(%r5) /* + tk->xtime_nsec */
al %r1,__VDSO_XTIME_NSEC+4(%r5)
brc 12,14f
ahi %r0,1
-14: l %r2,__VDSO_XTIME_SEC+4(%r5)
+14: l %r2,__VDSO_TK_SHIFT(%r5) /* Timekeeper shift */
+ srdl %r0,0(%r2) /* >> tk->shift */
+ l %r2,__VDSO_XTIME_SEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 11b
basr %r5,0
diff --git a/arch/s390/kernel/vdso32/gettimeofday.S b/arch/s390/kernel/vdso32/gettimeofday.S
index 2d3633175e3b..fd621a950f7c 100644
--- a/arch/s390/kernel/vdso32/gettimeofday.S
+++ b/arch/s390/kernel/vdso32/gettimeofday.S
@@ -35,15 +35,14 @@ __kernel_gettimeofday:
sl %r1,__VDSO_XTIME_STAMP+4(%r5)
brc 3,3f
ahi %r0,-1
-3: ms %r0,__VDSO_NTP_MULT(%r5) /* cyc2ns(clock,cycle_delta) */
+3: ms %r0,__VDSO_TK_MULT(%r5) /* * tk->mult */
st %r0,24(%r15)
- l %r0,__VDSO_NTP_MULT(%r5)
+ l %r0,__VDSO_TK_MULT(%r5)
ltr %r1,%r1
mr %r0,%r0
jnm 4f
- a %r0,__VDSO_NTP_MULT(%r5)
+ a %r0,__VDSO_TK_MULT(%r5)
4: al %r0,24(%r15)
- srdl %r0,12
al %r0,__VDSO_XTIME_NSEC(%r5) /* + xtime */
al %r1,__VDSO_XTIME_NSEC+4(%r5)
brc 12,5f
@@ -51,6 +50,8 @@ __kernel_gettimeofday:
5: mvc 24(4,%r15),__VDSO_XTIME_SEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 1b
+ l %r4,__VDSO_TK_SHIFT(%r5) /* Timekeeper shift */
+ srdl %r0,0(%r4) /* >> tk->shift */
l %r4,24(%r15) /* get tv_sec from stack */
basr %r5,0
6: ltr %r0,%r0
diff --git a/arch/s390/kernel/vdso64/clock_gettime.S b/arch/s390/kernel/vdso64/clock_gettime.S
index d46c95ed5f19..0add1072ba30 100644
--- a/arch/s390/kernel/vdso64/clock_gettime.S
+++ b/arch/s390/kernel/vdso64/clock_gettime.S
@@ -34,14 +34,15 @@ __kernel_clock_gettime:
tmll %r4,0x0001 /* pending update ? loop */
jnz 0b
stck 48(%r15) /* Store TOD clock */
+ lgf %r2,__VDSO_TK_SHIFT(%r5) /* Timekeeper shift */
+ lg %r0,__VDSO_XTIME_SEC(%r5) /* tk->xtime_sec */
+ alg %r0,__VDSO_WTOM_SEC(%r5) /* + wall_to_monotonic.sec */
lg %r1,48(%r15)
sg %r1,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
- msgf %r1,__VDSO_NTP_MULT(%r5) /* * NTP adjustment */
- srlg %r1,%r1,12 /* cyc2ns(clock,cycle_delta) */
- alg %r1,__VDSO_XTIME_NSEC(%r5) /* + xtime */
- lg %r0,__VDSO_XTIME_SEC(%r5)
- alg %r1,__VDSO_WTOM_NSEC(%r5) /* + wall_to_monotonic */
- alg %r0,__VDSO_WTOM_SEC(%r5)
+ msgf %r1,__VDSO_TK_MULT(%r5) /* * tk->mult */
+ alg %r1,__VDSO_XTIME_NSEC(%r5) /* + tk->xtime_nsec */
+ alg %r1,__VDSO_WTOM_NSEC(%r5) /* + wall_to_monotonic.nsec */
+ srlg %r1,%r1,0(%r2) /* >> tk->shift */
clg %r4,__VDSO_UPD_COUNT(%r5) /* check update counter */
jne 0b
larl %r5,13f
@@ -62,12 +63,13 @@ __kernel_clock_gettime:
tmll %r4,0x0001 /* pending update ? loop */
jnz 5b
stck 48(%r15) /* Store TOD clock */
+ lgf %r2,__VDSO_TK_SHIFT(%r5) /* Timekeeper shift */
lg %r1,48(%r15)
sg %r1,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
- msgf %r1,__VDSO_NTP_MULT(%r5) /* * NTP adjustment */
- srlg %r1,%r1,12 /* cyc2ns(clock,cycle_delta) */
- alg %r1,__VDSO_XTIME_NSEC(%r5) /* + xtime */
- lg %r0,__VDSO_XTIME_SEC(%r5)
+ msgf %r1,__VDSO_TK_MULT(%r5) /* * tk->mult */
+ alg %r1,__VDSO_XTIME_NSEC(%r5) /* + tk->xtime_nsec */
+ srlg %r1,%r1,0(%r2) /* >> tk->shift */
+ lg %r0,__VDSO_XTIME_SEC(%r5) /* tk->xtime_sec */
clg %r4,__VDSO_UPD_COUNT(%r5) /* check update counter */
jne 5b
larl %r5,13f
diff --git a/arch/s390/kernel/vdso64/gettimeofday.S b/arch/s390/kernel/vdso64/gettimeofday.S
index 36ee674722ec..d0860d1d0ccc 100644
--- a/arch/s390/kernel/vdso64/gettimeofday.S
+++ b/arch/s390/kernel/vdso64/gettimeofday.S
@@ -31,12 +31,13 @@ __kernel_gettimeofday:
stck 48(%r15) /* Store TOD clock */
lg %r1,48(%r15)
sg %r1,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
- msgf %r1,__VDSO_NTP_MULT(%r5) /* * NTP adjustment */
- srlg %r1,%r1,12 /* cyc2ns(clock,cycle_delta) */
- alg %r1,__VDSO_XTIME_NSEC(%r5) /* + xtime.tv_nsec */
- lg %r0,__VDSO_XTIME_SEC(%r5) /* xtime.tv_sec */
+ msgf %r1,__VDSO_TK_MULT(%r5) /* * tk->mult */
+ alg %r1,__VDSO_XTIME_NSEC(%r5) /* + tk->xtime_nsec */
+ lg %r0,__VDSO_XTIME_SEC(%r5) /* tk->xtime_sec */
clg %r4,__VDSO_UPD_COUNT(%r5) /* check update counter */
jne 0b
+ lgf %r5,__VDSO_TK_SHIFT(%r5) /* Timekeeper shift */
+ srlg %r1,%r1,0(%r5) /* >> tk->shift */
larl %r5,5f
2: clg %r1,0(%r5)
jl 3f
--
1.9.0
Jiri Slaby
2014-03-22 10:47:05 UTC
Permalink
From: Anssi Hannula <***@iki.fi>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 90f28002110d783f49639f0db2ccdc0b58302cbd upstream.

hdmi_std_setup_channel_mapping() selects a Channel Allocation according
to the sink reported speaker mask, preferring the ALSA standard layouts.

If the channel allocation is not one of the ALSA standard layouts, the
ALSA channels are mapped directly to HDMI channels in order. However,
the function does not take into account that there a holes in the HDMI
channel map.

Additionally, the function tries to disable a slot by using
AC_VERB_SET_CHAN_SLOT with parameter ((alsa_ch << 8) | 0xf), while the
correct parameter is ((0xf << 8) | hdmi_slot), i.e. the slot should be
unassigned, not the ALSA channel.

Fix both of the issues for non-ALSA-default layouts.

Tested on Intel HDMI with a speaker mask of FL | FR | FC | RC, which
causes CA 0x06 to be selected for 4-channel audio, which causes
incorrect output (sound destined to RC goes to FC and FC goes nowhere)
without the patch.

Signed-off-by: Anssi Hannula <***@iki.fi>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 417e0fc2d119..3b9002e00f30 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -608,22 +608,32 @@ static void hdmi_std_setup_channel_mapping(struct hda_codec *codec,
bool non_pcm,
int ca)
{
+ struct cea_channel_speaker_allocation *ch_alloc;
int i;
int err;
int order;
int non_pcm_mapping[8];

order = get_channel_allocation_order(ca);
+ ch_alloc = &channel_allocations[order];

if (hdmi_channel_mapping[ca][1] == 0) {
- for (i = 0; i < channel_allocations[order].channels; i++)
- hdmi_channel_mapping[ca][i] = i | (i << 4);
- for (; i < 8; i++)
- hdmi_channel_mapping[ca][i] = 0xf | (i << 4);
+ int hdmi_slot = 0;
+ /* fill actual channel mappings in ALSA channel (i) order */
+ for (i = 0; i < ch_alloc->channels; i++) {
+ while (!ch_alloc->speakers[7 - hdmi_slot] && !WARN_ON(hdmi_slot >= 8))
+ hdmi_slot++; /* skip zero slots */
+
+ hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++;
+ }
+ /* fill the rest of the slots with ALSA channel 0xf */
+ for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++)
+ if (!ch_alloc->speakers[7 - hdmi_slot])
+ hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot;
}

if (non_pcm) {
- for (i = 0; i < channel_allocations[order].channels; i++)
+ for (i = 0; i < ch_alloc->channels; i++)
non_pcm_mapping[i] = i | (i << 4);
for (; i < 8; i++)
non_pcm_mapping[i] = 0xf | (i << 4);
--
1.9.0
Jiri Slaby
2014-03-22 10:45:50 UTC
Permalink
From: Anssi Hannula <***@iki.fi>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit bb731f2100e614a8d7c5965d3663aed893859733 upstream.

Currently the available channel maps TLV only contains channel maps that
are limited to the traditional 7.1 speakers.

Since the other HDMI channel mapping functions have been fixed to
properly handle all CEA-861-E specified speakers, allow them to be
listed.

Signed-off-by: Anssi Hannula <***@iki.fi>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 4 ----
1 file changed, 4 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 57bc1fe010ba..2f4e668c661a 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1687,8 +1687,6 @@ static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct hda_codec *codec = info->private_data;
struct hdmi_spec *spec = codec->spec;
- const unsigned int valid_mask =
- FL | FR | RL | RR | LFE | FC | RLC | RRC;
unsigned int __user *dst;
int chs, count = 0;

@@ -1706,8 +1704,6 @@ static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
int chs_bytes = chs * 4;
if (cap->channels != chs)
continue;
- if (cap->spk_mask & ~valid_mask)
- continue;
if (size < 8)
return -ENOMEM;
if (put_user(SNDRV_CTL_TLVT_CHMAP_VAR, dst) ||
--
1.9.0
Jiri Slaby
2014-03-22 10:45:52 UTC
Permalink
From: Takashi Iwai <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit cbbaa603a03cc46681e24d6b2804b62fde95a2af upstream.

Some per_pin fields and ELD contents might be changed dynamically in
multiple ways where the concurrent accesses are still opened in the
current code. This patch fixes such possible races by using eld->lock
in appropriate places.

Reported-by: Anssi Hannula <***@iki.fi>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 37da6fb999f2..78338b9c6e9a 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1355,6 +1355,7 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
bool update_eld = false;
bool eld_changed = false;

+ mutex_lock(&pin_eld->lock);
pin_eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
if (pin_eld->monitor_present)
eld->eld_valid = !!(present & AC_PINSENSE_ELDV);
@@ -1384,11 +1385,10 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
queue_delayed_work(codec->bus->workq,
&per_pin->work,
msecs_to_jiffies(300));
- return;
+ goto unlock;
}
}

- mutex_lock(&pin_eld->lock);
if (pin_eld->eld_valid && !eld->eld_valid) {
update_eld = true;
eld_changed = true;
@@ -1413,12 +1413,13 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
hdmi_setup_audio_infoframe(codec, per_pin,
per_pin->non_pcm);
}
- mutex_unlock(&pin_eld->lock);

if (eld_changed)
snd_ctl_notify(codec->bus->card,
SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO,
&per_pin->eld_ctl->id);
+ unlock:
+ mutex_unlock(&pin_eld->lock);
}

static void hdmi_repoll_eld(struct work_struct *work)
@@ -1590,10 +1591,12 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
int pinctl;

non_pcm = check_non_pcm_per_cvt(codec, cvt_nid);
+ mutex_lock(&per_pin->sink_eld.lock);
per_pin->channels = substream->runtime->channels;
per_pin->setup = true;

hdmi_setup_audio_infoframe(codec, per_pin, non_pcm);
+ mutex_unlock(&per_pin->sink_eld.lock);

if (spec->dyn_pin_out) {
pinctl = snd_hda_codec_read(codec, pin_nid, 0,
@@ -1648,11 +1651,14 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo,
}

snd_hda_spdif_ctls_unassign(codec, pin_idx);
+
+ mutex_lock(&per_pin->sink_eld.lock);
per_pin->chmap_set = false;
memset(per_pin->chmap, 0, sizeof(per_pin->chmap));

per_pin->setup = false;
per_pin->channels = 0;
+ mutex_unlock(&per_pin->sink_eld.lock);
}

return 0;
@@ -1781,10 +1787,12 @@ static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
if (ca < 0)
return -EINVAL;
+ mutex_lock(&per_pin->sink_eld.lock);
per_pin->chmap_set = true;
memcpy(per_pin->chmap, chmap, sizeof(chmap));
if (prepared)
hdmi_setup_audio_infoframe(codec, per_pin, per_pin->non_pcm);
+ mutex_unlock(&per_pin->sink_eld.lock);

return 0;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:45:56 UTC
Permalink
From: Mengdong Lin <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 023838542dc8a4eac9650f98942671078a4ce73d upstream.

For Valleyview display codec, if an unused pin chooses an assgined converter
selected by a used pin, playback on the unused pin can also give sound to the
output device of the used pin. It's because data flows from the same convertor
to the display port of the used pin. This issue is same as Haswell.

So this patch avoids using assinged convertors for unused pins.
The related function haswell_config_cvts() is renamed for code reuse.

Signed-off-by: Mengdong Lin <***@intel.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 8b1e1d8775ba..33513e15a6cb 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -45,6 +45,7 @@ module_param(static_hdmi_pcm, bool, 0644);
MODULE_PARM_DESC(static_hdmi_pcm, "Don't restrict PCM parameters per ELD info");

#define is_haswell(codec) ((codec)->vendor_id == 0x80862807)
+#define is_valleyview(codec) ((codec)->vendor_id == 0x80862882)

struct hdmi_spec_per_cvt {
hda_nid_t cvt_nid;
@@ -1268,7 +1269,7 @@ static int hdmi_choose_cvt(struct hda_codec *codec,
return 0;
}

-static void haswell_config_cvts(struct hda_codec *codec,
+static void not_share_unassigned_cvt(struct hda_codec *codec,
hda_nid_t pin_nid, int mux_idx)
{
struct hdmi_spec *spec = codec->spec;
@@ -1347,8 +1348,8 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
mux_idx);

/* configure unused pins to choose other converters */
- if (is_haswell(codec))
- haswell_config_cvts(codec, per_pin->pin_nid, mux_idx);
+ if (is_haswell(codec) || is_valleyview(codec))
+ not_share_unassigned_cvt(codec, per_pin->pin_nid, mux_idx);

snd_hda_spdif_ctls_assign(codec, pin_idx, per_cvt->cvt_nid);
--
1.9.0
Jiri Slaby
2014-03-22 10:45:57 UTC
Permalink
From: Mengdong Lin <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 300016b960661b4df63690177b22ba5426ff5706 upstream.

The function name not_share_unassigned_cvt() is opposite to what it does.
This patch renames it to intel_not_share_assigned_cvt(), and addes comments
to explain why some Intel display codecs need this workaround.

Signed-off-by: Mengdong Lin <***@intel.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 33513e15a6cb..0a5c288dcc57 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1269,7 +1269,16 @@ static int hdmi_choose_cvt(struct hda_codec *codec,
return 0;
}

-static void not_share_unassigned_cvt(struct hda_codec *codec,
+/* Intel HDMI workaround to fix audio routing issue:
+ * For some Intel display codecs, pins share the same connection list.
+ * So a conveter can be selected by multiple pins and playback on any of these
+ * pins will generate sound on the external display, because audio flows from
+ * the same converter to the display pipeline. Also muting one pin may make
+ * other pins have no sound output.
+ * So this function assures that an assigned converter for a pin is not selected
+ * by any other pins.
+ */
+static void intel_not_share_assigned_cvt(struct hda_codec *codec,
hda_nid_t pin_nid, int mux_idx)
{
struct hdmi_spec *spec = codec->spec;
@@ -1349,7 +1358,7 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,

/* configure unused pins to choose other converters */
if (is_haswell(codec) || is_valleyview(codec))
- not_share_unassigned_cvt(codec, per_pin->pin_nid, mux_idx);
+ intel_not_share_assigned_cvt(codec, per_pin->pin_nid, mux_idx);

snd_hda_spdif_ctls_assign(codec, pin_idx, per_cvt->cvt_nid);
--
1.9.0
Jiri Slaby
2014-03-22 10:45:59 UTC
Permalink
From: Clemens Ladisch <***@ladisch.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit bbaa0d6665bc14133d7eb573d2b5ff898a06f365 upstream.

The device IDs of the AMD Cypress/Juniper/Redwood/Cedar/Cayman/Antilles/
Barts/Turks/Caicos HDMI HDA controllers weren't added explicitly
because the generic entry works, but it made the device appearing as
"Generic", and people are confused as if it's no proper HDMI
controller. Add them so that the name shows up properly as "ATI HDMI"
instead of "Generic".

According to Takashi's tests and the lack of complaints, these devices
work fine without disabling snooping.

Signed-off-by: Clemens Ladisch <***@ladisch.de>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/hda_intel.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 1c1b30fa1307..11da78f4dc57 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -4084,6 +4084,22 @@ static DEFINE_PCI_DEVICE_TABLE(azx_ids) = {
.driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
{ PCI_DEVICE(0x1002, 0xaa48),
.driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
+ { PCI_DEVICE(0x1002, 0xaa50),
+ .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
+ { PCI_DEVICE(0x1002, 0xaa58),
+ .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
+ { PCI_DEVICE(0x1002, 0xaa60),
+ .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
+ { PCI_DEVICE(0x1002, 0xaa68),
+ .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
+ { PCI_DEVICE(0x1002, 0xaa80),
+ .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
+ { PCI_DEVICE(0x1002, 0xaa88),
+ .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
+ { PCI_DEVICE(0x1002, 0xaa90),
+ .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
+ { PCI_DEVICE(0x1002, 0xaa98),
+ .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
{ PCI_DEVICE(0x1002, 0x9902),
.driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI },
{ PCI_DEVICE(0x1002, 0xaaa0),
--
1.9.0
Jiri Slaby
2014-03-22 10:46:01 UTC
Permalink
From: Takashi Iwai <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit efe4710860fa6ed10dd041f13902f0e06c86e8cc upstream.

There is a small gap between the jack detection unsolicited event and
the time the ELD is updated. When user-space queries the HDMI ELD
immediately after receiving the notification, it might fail because of
this gap.

For avoiding such a problem, this patch tries to delay the HDMI jack
detect notification until ELD information is fully updated. The
workaround is imperfect, but good enough as a starting point.

Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 0a5c288dcc57..aee302104290 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1092,7 +1092,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
* Unsolicited events
*/

-static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll);
+static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll);

static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
{
@@ -1118,8 +1118,8 @@ static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
if (pin_idx < 0)
return;

- hdmi_present_sense(get_pin(spec, pin_idx), 1);
- snd_hda_jack_report_sync(codec);
+ if (hdmi_present_sense(get_pin(spec, pin_idx), 1))
+ snd_hda_jack_report_sync(codec);
}

static void hdmi_non_intrinsic_event(struct hda_codec *codec, unsigned int res)
@@ -1416,7 +1416,7 @@ static int hdmi_read_pin_conn(struct hda_codec *codec, int pin_idx)
return 0;
}

-static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
+static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
{
struct hda_codec *codec = per_pin->codec;
struct hdmi_spec *spec = codec->spec;
@@ -1434,6 +1434,7 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
int present = snd_hda_pin_sense(codec, pin_nid);
bool update_eld = false;
bool eld_changed = false;
+ bool ret;

mutex_lock(&per_pin->lock);
pin_eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
@@ -1499,7 +1500,12 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO,
&per_pin->eld_ctl->id);
unlock:
+ if ((codec->vendor_id & 0xffff0000) == 0x10020000)
+ ret = true; /* AMD codecs create ELD by itself */
+ else
+ ret = !repoll || !pin_eld->monitor_present || pin_eld->eld_valid;
mutex_unlock(&per_pin->lock);
+ return ret;
}

static void hdmi_repoll_eld(struct work_struct *work)
@@ -1510,7 +1516,8 @@ static void hdmi_repoll_eld(struct work_struct *work)
if (per_pin->repoll_count++ > 6)
per_pin->repoll_count = 0;

- hdmi_present_sense(per_pin, per_pin->repoll_count);
+ if (hdmi_present_sense(per_pin, per_pin->repoll_count))
+ snd_hda_jack_report_sync(per_pin->codec);
}

static void intel_haswell_fixup_connect_list(struct hda_codec *codec,
--
1.9.0
Jiri Slaby
2014-03-22 10:45:58 UTC
Permalink
From: James Ralston <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 4eeca499be4ff4216b745e35ae8c8bffa6445eac upstream.

This patch adds the HD Audio Device IDs for the Intel Wildcat Point-LP PCH.

Signed-off-by: James Ralston <***@intel.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/hda_intel.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index f7e76619f7c9..1c1b30fa1307 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -169,6 +169,7 @@ MODULE_SUPPORTED_DEVICE("{{Intel, ICH6},"
"{Intel, PPT},"
"{Intel, LPT},"
"{Intel, LPT_LP},"
+ "{Intel, WPT_LP},"
"{Intel, HPT},"
"{Intel, PBG},"
"{Intel, SCH},"
@@ -3994,6 +3995,9 @@ static DEFINE_PCI_DEVICE_TABLE(azx_ids) = {
/* Lynx Point-LP */
{ PCI_DEVICE(0x8086, 0x9c21),
.driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
+ /* Wildcat Point-LP */
+ { PCI_DEVICE(0x8086, 0x9ca0),
+ .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
/* Haswell */
{ PCI_DEVICE(0x8086, 0x0a0c),
.driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_HASWELL },
--
1.9.0
Jiri Slaby
2014-03-22 10:46:07 UTC
Permalink
From: James Bates <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 55aa42f2e690157e254a6a6989f5f4ac928b35c8 upstream.

The dmi_list array is initialized using gnu designated initializers, and
therefore may contain fewer explicitly defined entries as there are
elements in it. This is because the enum above with M_xyz constants
contains more items than the designated initializer. Those elements not
explicitly initialized are implicitly set to 0.

Now efifb_setup() loops through all these array elements, and performs
a strcmp on each item. For non explicitly initialized elements this will
be a null pointer:

This patch swaps the check order in the if statement, thus checks first
whether dmi_list[i].base is null.

Signed-off-by: James Bates <***@gmail.com>
Signed-off-by: David Herrmann <***@gmail.com>
Signed-off-by: Tomi Valkeinen <***@ti.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/video/efifb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c
index 7f9ff75d0db2..fcb950031246 100644
--- a/drivers/video/efifb.c
+++ b/drivers/video/efifb.c
@@ -108,8 +108,8 @@ static int efifb_setup(char *options)
if (!*this_opt) continue;

for (i = 0; i < M_UNKNOWN; i++) {
- if (!strcmp(this_opt, efifb_dmi_list[i].optname) &&
- efifb_dmi_list[i].base != 0) {
+ if (efifb_dmi_list[i].base != 0 &&
+ !strcmp(this_opt, efifb_dmi_list[i].optname)) {
screen_info.lfb_base = efifb_dmi_list[i].base;
screen_info.lfb_linelength = efifb_dmi_list[i].stride;
screen_info.lfb_width = efifb_dmi_list[i].width;
--
1.9.0
Jiri Slaby
2014-03-22 10:45:54 UTC
Permalink
From: Mengdong Lin <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit cc1a95d9f6423ced191b6f264e9657d98844ea0d upstream.

This patch adds codec ID (0x80862882) and module alias for
Valleyview2 display codec.

Signed-off-by: Mengdong Lin <***@intel.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index e4c07fec210f..0b803af43b6d 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2826,6 +2826,7 @@ static const struct hda_codec_preset snd_hda_preset_hdmi[] = {
{ .id = 0x80862806, .name = "PantherPoint HDMI", .patch = patch_generic_hdmi },
{ .id = 0x80862807, .name = "Haswell HDMI", .patch = patch_generic_hdmi },
{ .id = 0x80862880, .name = "CedarTrail HDMI", .patch = patch_generic_hdmi },
+{ .id = 0x80862882, .name = "Valleyview2 HDMI", .patch = patch_generic_hdmi },
{ .id = 0x808629fb, .name = "Crestline HDMI", .patch = patch_generic_hdmi },
{} /* terminator */
};
@@ -2880,6 +2881,7 @@ MODULE_ALIAS("snd-hda-codec-id:80862805");
MODULE_ALIAS("snd-hda-codec-id:80862806");
MODULE_ALIAS("snd-hda-codec-id:80862807");
MODULE_ALIAS("snd-hda-codec-id:80862880");
+MODULE_ALIAS("snd-hda-codec-id:80862882");
MODULE_ALIAS("snd-hda-codec-id:808629fb");

MODULE_LICENSE("GPL");
--
1.9.0
Jiri Slaby
2014-03-22 10:46:02 UTC
Permalink
From: David Henningsson <***@canonical.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit da4a7a3926d09c13ae052ede67feb7285e01e3f5 upstream.

This should help us avoid the following mutex deadlock:

[] mutex_lock+0x2a/0x50
[] hdmi_present_sense+0x53/0x3a0 [snd_hda_codec_hdmi]
[] generic_hdmi_resume+0x5a/0x70 [snd_hda_codec_hdmi]
[] hda_call_codec_resume+0xec/0x1d0 [snd_hda_codec]
[] snd_hda_power_save+0x1e4/0x280 [snd_hda_codec]
[] codec_exec_verb+0x5f/0x290 [snd_hda_codec]
[] snd_hda_codec_read+0x5b/0x90 [snd_hda_codec]
[] snd_hdmi_get_eld_size+0x1e/0x20 [snd_hda_codec_hdmi]
[] snd_hdmi_get_eld+0x2c/0xd0 [snd_hda_codec_hdmi]
[] hdmi_present_sense+0x9a/0x3a0 [snd_hda_codec_hdmi]
[] hdmi_repoll_eld+0x34/0x50 [snd_hda_codec_hdmi]

Signed-off-by: David Henningsson <***@canonical.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index aee302104290..adb374babd18 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1431,11 +1431,14 @@ static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
* specification worked this way. Hence, we just ignore the data in
* the unsolicited response to avoid custom WARs.
*/
- int present = snd_hda_pin_sense(codec, pin_nid);
+ int present;
bool update_eld = false;
bool eld_changed = false;
bool ret;

+ snd_hda_power_up(codec);
+ present = snd_hda_pin_sense(codec, pin_nid);
+
mutex_lock(&per_pin->lock);
pin_eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
if (pin_eld->monitor_present)
@@ -1505,6 +1508,7 @@ static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
else
ret = !repoll || !pin_eld->monitor_present || pin_eld->eld_valid;
mutex_unlock(&per_pin->lock);
+ snd_hda_power_down(codec);
return ret;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:45:51 UTC
Permalink
From: Anssi Hannula <***@iki.fi>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 980b24958f0c615fd003d37f0fce4ab1ecd01784 upstream.

Allow channel map debugging for both automatic and manual channel maps,
and print CA always when updating infoframe.

Signed-off-by: Anssi Hannula <***@iki.fi>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 2f4e668c661a..37da6fb999f2 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -650,8 +650,6 @@ static void hdmi_std_setup_channel_mapping(struct hda_codec *codec,
break;
}
}
-
- hdmi_debug_channel_mapping(codec, pin_nid);
}

struct channel_map_table {
@@ -806,6 +804,8 @@ static void hdmi_setup_channel_mapping(struct hda_codec *codec,
hdmi_std_setup_channel_mapping(codec, pin_nid, non_pcm, ca);
hdmi_setup_fake_chmap(map, ca);
}
+
+ hdmi_debug_channel_mapping(codec, pin_nid);
}

/*
@@ -1004,9 +1004,9 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
if (!hdmi_infoframe_uptodate(codec, pin_nid, ai.bytes,
sizeof(ai))) {
snd_printdd("hdmi_setup_audio_infoframe: "
- "pin=%d channels=%d\n",
+ "pin=%d channels=%d ca=0x%02x\n",
pin_nid,
- active_channels);
+ active_channels, ca);
hdmi_stop_infoframe_trans(codec, pin_nid);
hdmi_fill_audio_infoframe(codec, pin_nid,
ai.bytes, sizeof(ai));
--
1.9.0
Jiri Slaby
2014-03-22 10:46:13 UTC
Permalink
From: Benjamin Herrenschmidt <***@kernel.crashing.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 0c4888ef1d8a8b82c29075ce7e257ff795af15c7 upstream.

When restoring the PPR value, we incorrectly access the thread structure
at a time where MSR:RI is clear, which means we cannot recover from nested
faults. However the thread structure isn't covered by the "bolted" SLB
entries and thus accessing can fault.

This fixes it by splitting the code so that the PPR value is loaded into
a GPR before MSR:RI is cleared.

Signed-off-by: Benjamin Herrenschmidt <***@kernel.crashing.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/powerpc/include/asm/ppc_asm.h | 7 -------
arch/powerpc/kernel/entry_64.S | 10 +++++++++-
2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index 599545738af3..c2dcfaa51987 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -478,13 +478,6 @@ BEGIN_FTR_SECTION_NESTED(945) \
std ra,TASKTHREADPPR(rb); \
END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,945)

-#define RESTORE_PPR(ra, rb) \
-BEGIN_FTR_SECTION_NESTED(946) \
- ld ra,PACACURRENT(r13); \
- ld rb,TASKTHREADPPR(ra); \
- mtspr SPRN_PPR,rb; /* Restore PPR */ \
-END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,946)
-
#endif

/*
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index c04cdf70d487..7be37170fda7 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -820,6 +820,12 @@ fast_exception_return:
andi. r0,r3,MSR_RI
beq- unrecov_restore

+ /* Load PPR from thread struct before we clear MSR:RI */
+BEGIN_FTR_SECTION
+ ld r2,PACACURRENT(r13)
+ ld r2,TASKTHREADPPR(r2)
+END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
+
/*
* Clear RI before restoring r13. If we are returning to
* userspace and we take an exception after restoring r13,
@@ -840,8 +846,10 @@ fast_exception_return:
*/
andi. r0,r3,MSR_PR
beq 1f
+BEGIN_FTR_SECTION
+ mtspr SPRN_PPR,r2 /* Restore PPR */
+END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
ACCOUNT_CPU_USER_EXIT(r2, r4)
- RESTORE_PPR(r2, r4)
REST_GPR(13, r1)
1:
mtspr SPRN_SRR1,r3
--
1.9.0
Jiri Slaby
2014-03-22 10:46:10 UTC
Permalink
From: Thomas Gleixner <***@linutronix.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit d689fe222a858c767cb8594faf280048e532b53f upstream.

RCU and the fine grained idle time accounting functions check
tick_nohz_enabled. But that variable is merily telling that NOHZ has
been enabled in the config and not been disabled on the command line.

But it does not tell anything about nohz being active. That's what all
this should check for.

Matthew reported, that the idle accounting on his old P1 machine
showed bogus values, when he enabled NOHZ in the config and did not
disable it on the kernel command line. The reason is that his machine
uses (refined) jiffies as a clocksource which explains why the "fine"
grained accounting went into lala land, because it depends on when the
system goes and leaves idle relative to the jiffies increment.

Provide a tick_nohz_active indicator and let RCU and the accounting
code use this instead of tick_nohz_enable.

Reported-and-tested-by: Matthew Whitehead <***@gmail.com>
Signed-off-by: Thomas Gleixner <***@linutronix.de>
Reviewed-by: Steven Rostedt <***@goodmis.org>
Reviewed-by: Paul E. McKenney <***@linux.vnet.ibm.com>
Cc: ***@linaro.org
Cc: ***@redhat.com
Link: http://lkml.kernel.org/r/***@ionos.tec.linutronix.de
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/rcutree_plugin.h | 4 ++--
kernel/time/tick-sched.c | 21 +++++++++------------
2 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index 130c97b027f2..fd71cef0d789 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -1627,7 +1627,7 @@ module_param(rcu_idle_gp_delay, int, 0644);
static int rcu_idle_lazy_gp_delay = RCU_IDLE_LAZY_GP_DELAY;
module_param(rcu_idle_lazy_gp_delay, int, 0644);

-extern int tick_nohz_enabled;
+extern int tick_nohz_active;

/*
* Try to advance callbacks for all flavors of RCU on the current CPU.
@@ -1718,7 +1718,7 @@ static void rcu_prepare_for_idle(int cpu)
int tne;

/* Handle nohz enablement switches conservatively. */
- tne = ACCESS_ONCE(tick_nohz_enabled);
+ tne = ACCESS_ONCE(tick_nohz_active);
if (tne != rdtp->tick_nohz_enabled_snap) {
if (rcu_cpu_has_callbacks(cpu, NULL))
invoke_rcu_core(); /* force nohz to see update. */
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index d78253eb3b74..ea20f7d1ac2c 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -361,8 +361,8 @@ void __init tick_nohz_init(void)
/*
* NO HZ enabled ?
*/
-int tick_nohz_enabled __read_mostly = 1;
-
+static int tick_nohz_enabled __read_mostly = 1;
+int tick_nohz_active __read_mostly;
/*
* Enable / Disable tickless mode
*/
@@ -465,7 +465,7 @@ u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time)
struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
ktime_t now, idle;

- if (!tick_nohz_enabled)
+ if (!tick_nohz_active)
return -1;

now = ktime_get();
@@ -506,7 +506,7 @@ u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time)
struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
ktime_t now, iowait;

- if (!tick_nohz_enabled)
+ if (!tick_nohz_active)
return -1;

now = ktime_get();
@@ -801,11 +801,6 @@ void tick_nohz_idle_enter(void)
local_irq_disable();

ts = &__get_cpu_var(tick_cpu_sched);
- /*
- * set ts->inidle unconditionally. even if the system did not
- * switch to nohz mode the cpu frequency governers rely on the
- * update of the idle time accounting in tick_nohz_start_idle().
- */
ts->inidle = 1;
__tick_nohz_idle_enter(ts);

@@ -975,7 +970,7 @@ static void tick_nohz_switch_to_nohz(void)
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
ktime_t next;

- if (!tick_nohz_enabled)
+ if (!tick_nohz_active)
return;

local_irq_disable();
@@ -983,7 +978,7 @@ static void tick_nohz_switch_to_nohz(void)
local_irq_enable();
return;
}
-
+ tick_nohz_active = 1;
ts->nohz_mode = NOHZ_MODE_LOWRES;

/*
@@ -1141,8 +1136,10 @@ void tick_setup_sched_timer(void)
}

#ifdef CONFIG_NO_HZ_COMMON
- if (tick_nohz_enabled)
+ if (tick_nohz_enabled) {
ts->nohz_mode = NOHZ_MODE_HIGHRES;
+ tick_nohz_active = 1;
+ }
#endif
}
#endif /* HIGH_RES_TIMERS */
--
1.9.0
Jiri Slaby
2014-03-22 10:45:55 UTC
Permalink
From: Takashi Iwai <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit b55447a7301b12d509df4b2909ed38d125ad83d4 upstream.

... which was introduced by the previous commit a4e9a38b, causing
build errors without CONFIG_PROC_FS.

Reported-by: Fengguang Wu <***@intel.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_hdmi.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 0b803af43b6d..8b1e1d8775ba 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -552,12 +552,12 @@ static void eld_proc_free(struct hdmi_spec_per_pin *per_pin)
}
}
#else
-static inline int snd_hda_eld_proc_new(struct hdmi_spec_per_pin *per_pin,
- int index)
+static inline int eld_proc_new(struct hdmi_spec_per_pin *per_pin,
+ int index)
{
return 0;
}
-static inline void snd_hda_eld_proc_free(struct hdmi_spec_per_pin *per_pin)
+static inline void eld_proc_free(struct hdmi_spec_per_pin *per_pin)
{
}
#endif
--
1.9.0
Jiri Slaby
2014-03-22 10:46:00 UTC
Permalink
From: Takashi Iwai <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit fab1285a51b7bf55adb4678d82e606829c9dab85 upstream.

"HDA Intel MID" is no correct name for Haswell HDMI controllers.
Give them a better name, "HDA Intel HDMI".

Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/hda_intel.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 11da78f4dc57..ccf5eb6b3d37 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -569,6 +569,7 @@ enum {
AZX_DRIVER_ICH,
AZX_DRIVER_PCH,
AZX_DRIVER_SCH,
+ AZX_DRIVER_HDMI,
AZX_DRIVER_ATI,
AZX_DRIVER_ATIHDMI,
AZX_DRIVER_ATIHDMI_NS,
@@ -648,6 +649,7 @@ static char *driver_short_names[] = {
[AZX_DRIVER_ICH] = "HDA Intel",
[AZX_DRIVER_PCH] = "HDA Intel PCH",
[AZX_DRIVER_SCH] = "HDA Intel MID",
+ [AZX_DRIVER_HDMI] = "HDA Intel HDMI",
[AZX_DRIVER_ATI] = "HDA ATI SB",
[AZX_DRIVER_ATIHDMI] = "HDA ATI HDMI",
[AZX_DRIVER_ATIHDMI_NS] = "HDA ATI HDMI",
@@ -4000,11 +4002,11 @@ static DEFINE_PCI_DEVICE_TABLE(azx_ids) = {
.driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
/* Haswell */
{ PCI_DEVICE(0x8086, 0x0a0c),
- .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_HASWELL },
+ .driver_data = AZX_DRIVER_HDMI | AZX_DCAPS_INTEL_HASWELL },
{ PCI_DEVICE(0x8086, 0x0c0c),
- .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_HASWELL },
+ .driver_data = AZX_DRIVER_HDMI | AZX_DCAPS_INTEL_HASWELL },
{ PCI_DEVICE(0x8086, 0x0d0c),
- .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_HASWELL },
+ .driver_data = AZX_DRIVER_HDMI | AZX_DCAPS_INTEL_HASWELL },
/* 5 Series/3400 */
{ PCI_DEVICE(0x8086, 0x3b56),
.driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_PCH_NOPM },
--
1.9.0
Jiri Slaby
2014-03-22 10:45:53 UTC
Permalink
From: Takashi Iwai <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit a4e9a38b40a0e2f7dad1a0b355896d23fbdd16e0 upstream.

Since the lock is used primarily in patch_hdmi.c, it's better to move
it in the local struct instead of exporting in hda_eld. The only
functions requiring the lock in hda_eld.c are proc accessors. So in
this patch, the proc entry and its creation/deletion/accessors are
moved into patch_hdmi.c, together with the mutex lock to pin_spec
struct.

The former proc info functions are exported so that they can be called
from patch_hdmi.c.

Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/hda_eld.c | 48 +++-----------------
sound/pci/hda/hda_local.h | 22 ++-------
sound/pci/hda/patch_hdmi.c | 108 ++++++++++++++++++++++++++++++++++++---------
3 files changed, 97 insertions(+), 81 deletions(-)

diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c
index d0d7ac1e99d2..f62356c2f54c 100644
--- a/sound/pci/hda/hda_eld.c
+++ b/sound/pci/hda/hda_eld.c
@@ -478,10 +478,9 @@ static void hdmi_print_sad_info(int i, struct cea_sad *a,
snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
}

-static void hdmi_print_eld_info(struct snd_info_entry *entry,
- struct snd_info_buffer *buffer)
+void snd_hdmi_print_eld_info(struct hdmi_eld *eld,
+ struct snd_info_buffer *buffer)
{
- struct hdmi_eld *eld = entry->private_data;
struct parsed_hdmi_eld *e = &eld->info;
char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
int i;
@@ -500,13 +499,10 @@ static void hdmi_print_eld_info(struct snd_info_entry *entry,
[4 ... 7] = "reserved"
};

- mutex_lock(&eld->lock);
snd_iprintf(buffer, "monitor_present\t\t%d\n", eld->monitor_present);
snd_iprintf(buffer, "eld_valid\t\t%d\n", eld->eld_valid);
- if (!eld->eld_valid) {
- mutex_unlock(&eld->lock);
+ if (!eld->eld_valid)
return;
- }
snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
snd_iprintf(buffer, "connection_type\t\t%s\n",
eld_connection_type_names[e->conn_type]);
@@ -528,13 +524,11 @@ static void hdmi_print_eld_info(struct snd_info_entry *entry,

for (i = 0; i < e->sad_count; i++)
hdmi_print_sad_info(i, e->sad + i, buffer);
- mutex_unlock(&eld->lock);
}

-static void hdmi_write_eld_info(struct snd_info_entry *entry,
- struct snd_info_buffer *buffer)
+void snd_hdmi_write_eld_info(struct hdmi_eld *eld,
+ struct snd_info_buffer *buffer)
{
- struct hdmi_eld *eld = entry->private_data;
struct parsed_hdmi_eld *e = &eld->info;
char line[64];
char name[64];
@@ -542,7 +536,6 @@ static void hdmi_write_eld_info(struct snd_info_entry *entry,
long long val;
unsigned int n;

- mutex_lock(&eld->lock);
while (!snd_info_get_line(buffer, line, sizeof(line))) {
if (sscanf(line, "%s %llx", name, &val) != 2)
continue;
@@ -594,38 +587,7 @@ static void hdmi_write_eld_info(struct snd_info_entry *entry,
e->sad_count = n + 1;
}
}
- mutex_unlock(&eld->lock);
-}
-
-
-int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld,
- int index)
-{
- char name[32];
- struct snd_info_entry *entry;
- int err;
-
- snprintf(name, sizeof(name), "eld#%d.%d", codec->addr, index);
- err = snd_card_proc_new(codec->bus->card, name, &entry);
- if (err < 0)
- return err;
-
- snd_info_set_text_ops(entry, eld, hdmi_print_eld_info);
- entry->c.text.write = hdmi_write_eld_info;
- entry->mode |= S_IWUSR;
- eld->proc_entry = entry;
-
- return 0;
-}
-
-void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld)
-{
- if (!codec->bus->shutdown && eld->proc_entry) {
- snd_device_free(codec->bus->card, eld->proc_entry);
- eld->proc_entry = NULL;
- }
}
-
#endif /* CONFIG_PROC_FS */

/* update PCM info based on ELD */
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
index 2e7493ef8ee0..040d93324f32 100644
--- a/sound/pci/hda/hda_local.h
+++ b/sound/pci/hda/hda_local.h
@@ -751,10 +751,6 @@ struct hdmi_eld {
int eld_size;
char eld_buffer[ELD_MAX_SIZE];
struct parsed_hdmi_eld info;
- struct mutex lock;
-#ifdef CONFIG_PROC_FS
- struct snd_info_entry *proc_entry;
-#endif
};

int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid);
@@ -767,20 +763,10 @@ void snd_hdmi_eld_update_pcm_info(struct parsed_hdmi_eld *e,
struct hda_pcm_stream *hinfo);

#ifdef CONFIG_PROC_FS
-int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld,
- int index);
-void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld);
-#else
-static inline int snd_hda_eld_proc_new(struct hda_codec *codec,
- struct hdmi_eld *eld,
- int index)
-{
- return 0;
-}
-static inline void snd_hda_eld_proc_free(struct hda_codec *codec,
- struct hdmi_eld *eld)
-{
-}
+void snd_hdmi_print_eld_info(struct hdmi_eld *eld,
+ struct snd_info_buffer *buffer);
+void snd_hdmi_write_eld_info(struct hdmi_eld *eld,
+ struct snd_info_buffer *buffer);
#endif

#define SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE 80
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 78338b9c6e9a..e4c07fec210f 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -67,6 +67,7 @@ struct hdmi_spec_per_pin {

struct hda_codec *codec;
struct hdmi_eld sink_eld;
+ struct mutex lock;
struct delayed_work work;
struct snd_kcontrol *eld_ctl;
int repoll_count;
@@ -76,6 +77,9 @@ struct hdmi_spec_per_pin {
bool chmap_set; /* channel-map override by ALSA API? */
unsigned char chmap[8]; /* ALSA API channel-map */
char pcm_name[8]; /* filled in build_pcm callbacks */
+#ifdef CONFIG_PROC_FS
+ struct snd_info_entry *proc_entry;
+#endif
};

struct hdmi_spec {
@@ -352,17 +356,19 @@ static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
{
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
struct hdmi_spec *spec = codec->spec;
+ struct hdmi_spec_per_pin *per_pin;
struct hdmi_eld *eld;
int pin_idx;

uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;

pin_idx = kcontrol->private_value;
- eld = &get_pin(spec, pin_idx)->sink_eld;
+ per_pin = get_pin(spec, pin_idx);
+ eld = &per_pin->sink_eld;

- mutex_lock(&eld->lock);
+ mutex_lock(&per_pin->lock);
uinfo->count = eld->eld_valid ? eld->eld_size : 0;
- mutex_unlock(&eld->lock);
+ mutex_unlock(&per_pin->lock);

return 0;
}
@@ -372,15 +378,17 @@ static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
{
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
struct hdmi_spec *spec = codec->spec;
+ struct hdmi_spec_per_pin *per_pin;
struct hdmi_eld *eld;
int pin_idx;

pin_idx = kcontrol->private_value;
- eld = &get_pin(spec, pin_idx)->sink_eld;
+ per_pin = get_pin(spec, pin_idx);
+ eld = &per_pin->sink_eld;

- mutex_lock(&eld->lock);
+ mutex_lock(&per_pin->lock);
if (eld->eld_size > ARRAY_SIZE(ucontrol->value.bytes.data)) {
- mutex_unlock(&eld->lock);
+ mutex_unlock(&per_pin->lock);
snd_BUG();
return -EINVAL;
}
@@ -390,7 +398,7 @@ static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
if (eld->eld_valid)
memcpy(ucontrol->value.bytes.data, eld->eld_buffer,
eld->eld_size);
- mutex_unlock(&eld->lock);
+ mutex_unlock(&per_pin->lock);

return 0;
}
@@ -491,6 +499,68 @@ static void hdmi_set_channel_count(struct hda_codec *codec,
AC_VERB_SET_CVT_CHAN_COUNT, chs - 1);
}

+/*
+ * ELD proc files
+ */
+
+#ifdef CONFIG_PROC_FS
+static void print_eld_info(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct hdmi_spec_per_pin *per_pin = entry->private_data;
+
+ mutex_lock(&per_pin->lock);
+ snd_hdmi_print_eld_info(&per_pin->sink_eld, buffer);
+ mutex_unlock(&per_pin->lock);
+}
+
+static void write_eld_info(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct hdmi_spec_per_pin *per_pin = entry->private_data;
+
+ mutex_lock(&per_pin->lock);
+ snd_hdmi_write_eld_info(&per_pin->sink_eld, buffer);
+ mutex_unlock(&per_pin->lock);
+}
+
+static int eld_proc_new(struct hdmi_spec_per_pin *per_pin, int index)
+{
+ char name[32];
+ struct hda_codec *codec = per_pin->codec;
+ struct snd_info_entry *entry;
+ int err;
+
+ snprintf(name, sizeof(name), "eld#%d.%d", codec->addr, index);
+ err = snd_card_proc_new(codec->bus->card, name, &entry);
+ if (err < 0)
+ return err;
+
+ snd_info_set_text_ops(entry, per_pin, print_eld_info);
+ entry->c.text.write = write_eld_info;
+ entry->mode |= S_IWUSR;
+ per_pin->proc_entry = entry;
+
+ return 0;
+}
+
+static void eld_proc_free(struct hdmi_spec_per_pin *per_pin)
+{
+ if (!per_pin->codec->bus->shutdown && per_pin->proc_entry) {
+ snd_device_free(per_pin->codec->bus->card, per_pin->proc_entry);
+ per_pin->proc_entry = NULL;
+ }
+}
+#else
+static inline int snd_hda_eld_proc_new(struct hdmi_spec_per_pin *per_pin,
+ int index)
+{
+ return 0;
+}
+static inline void snd_hda_eld_proc_free(struct hdmi_spec_per_pin *per_pin)
+{
+}
+#endif

/*
* Channel mapping routines
@@ -1355,7 +1425,7 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
bool update_eld = false;
bool eld_changed = false;

- mutex_lock(&pin_eld->lock);
+ mutex_lock(&per_pin->lock);
pin_eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
if (pin_eld->monitor_present)
eld->eld_valid = !!(present & AC_PINSENSE_ELDV);
@@ -1419,7 +1489,7 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO,
&per_pin->eld_ctl->id);
unlock:
- mutex_unlock(&pin_eld->lock);
+ mutex_unlock(&per_pin->lock);
}

static void hdmi_repoll_eld(struct work_struct *work)
@@ -1591,12 +1661,12 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
int pinctl;

non_pcm = check_non_pcm_per_cvt(codec, cvt_nid);
- mutex_lock(&per_pin->sink_eld.lock);
+ mutex_lock(&per_pin->lock);
per_pin->channels = substream->runtime->channels;
per_pin->setup = true;

hdmi_setup_audio_infoframe(codec, per_pin, non_pcm);
- mutex_unlock(&per_pin->sink_eld.lock);
+ mutex_unlock(&per_pin->lock);

if (spec->dyn_pin_out) {
pinctl = snd_hda_codec_read(codec, pin_nid, 0,
@@ -1652,13 +1722,13 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo,

snd_hda_spdif_ctls_unassign(codec, pin_idx);

- mutex_lock(&per_pin->sink_eld.lock);
+ mutex_lock(&per_pin->lock);
per_pin->chmap_set = false;
memset(per_pin->chmap, 0, sizeof(per_pin->chmap));

per_pin->setup = false;
per_pin->channels = 0;
- mutex_unlock(&per_pin->sink_eld.lock);
+ mutex_unlock(&per_pin->lock);
}

return 0;
@@ -1787,12 +1857,12 @@ static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol,
ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap);
if (ca < 0)
return -EINVAL;
- mutex_lock(&per_pin->sink_eld.lock);
+ mutex_lock(&per_pin->lock);
per_pin->chmap_set = true;
memcpy(per_pin->chmap, chmap, sizeof(chmap));
if (prepared)
hdmi_setup_audio_infoframe(codec, per_pin, per_pin->non_pcm);
- mutex_unlock(&per_pin->sink_eld.lock);
+ mutex_unlock(&per_pin->lock);

return 0;
}
@@ -1909,12 +1979,11 @@ static int generic_hdmi_init_per_pins(struct hda_codec *codec)

for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
- struct hdmi_eld *eld = &per_pin->sink_eld;

per_pin->codec = codec;
- mutex_init(&eld->lock);
+ mutex_init(&per_pin->lock);
INIT_DELAYED_WORK(&per_pin->work, hdmi_repoll_eld);
- snd_hda_eld_proc_new(codec, eld, pin_idx);
+ eld_proc_new(per_pin, pin_idx);
}
return 0;
}
@@ -1955,10 +2024,9 @@ static void generic_hdmi_free(struct hda_codec *codec)

for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
- struct hdmi_eld *eld = &per_pin->sink_eld;

cancel_delayed_work(&per_pin->work);
- snd_hda_eld_proc_free(codec, eld);
+ eld_proc_free(per_pin);
}

flush_workqueue(codec->bus->workq);
--
1.9.0
Jiri Slaby
2014-03-22 10:46:04 UTC
Permalink
From: Huang Rui <***@amd.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 3ad145b62a15c86150dd0cc229a39a3120d462f9 upstream.

Commit "usb: pci-quirks: refactor AMD quirk to abstract AMD chipset types"
introduced a new AMD chipset type to filter AMD platforms with different
chipsets.

According to a recent thread [1], this patch updates USB subsystem hang
symptom quirk which is observed on AMD all SB600 and SB700 revision
0x3a/0x3b. And make it use the new chipset type to represent.

[1] http://marc.info/?l=linux-usb&m=138012321616452&w=2

Signed-off-by: Huang Rui <***@amd.com>
Acked-by: Alan Stern <***@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/host/ehci-pci.c | 24 ++++++------------------
drivers/usb/host/pci-quirks.c | 13 +++++++++++++
drivers/usb/host/pci-quirks.h | 1 +
3 files changed, 20 insertions(+), 18 deletions(-)

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 854c2ec7b699..3e86bf4371b3 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -58,8 +58,6 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
- struct pci_dev *p_smbus;
- u8 rev;
u32 temp;
int retval;

@@ -175,22 +173,12 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
/* SB600 and old version of SB700 have a bug in EHCI controller,
* which causes usb devices lose response in some cases.
*/
- if ((pdev->device == 0x4386) || (pdev->device == 0x4396)) {
- p_smbus = pci_get_device(PCI_VENDOR_ID_ATI,
- PCI_DEVICE_ID_ATI_SBX00_SMBUS,
- NULL);
- if (!p_smbus)
- break;
- rev = p_smbus->revision;
- if ((pdev->device == 0x4386) || (rev == 0x3a)
- || (rev == 0x3b)) {
- u8 tmp;
- ehci_info(ehci, "applying AMD SB600/SB700 USB "
- "freeze workaround\n");
- pci_read_config_byte(pdev, 0x53, &tmp);
- pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
- }
- pci_dev_put(p_smbus);
+ if ((pdev->device == 0x4386 || pdev->device == 0x4396) &&
+ usb_amd_hang_symptom_quirk()) {
+ u8 tmp;
+ ehci_info(ehci, "applying AMD SB600/SB700 USB freeze workaround\n");
+ pci_read_config_byte(pdev, 0x53, &tmp);
+ pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
}
break;
case PCI_VENDOR_ID_NETMOS:
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index daa1e5821dea..35111deede13 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -250,6 +250,19 @@ commit:
}
EXPORT_SYMBOL_GPL(usb_amd_find_chipset_info);

+bool usb_amd_hang_symptom_quirk(void)
+{
+ u8 rev;
+
+ usb_amd_find_chipset_info();
+ rev = amd_chipset.sb_type.rev;
+ /* SB600 and old version of SB700 have hang symptom bug */
+ return amd_chipset.sb_type.gen == AMD_CHIPSET_SB600 ||
+ (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 &&
+ rev >= 0x3a && rev <= 0x3b);
+}
+EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk);
+
/*
* The hardware normally enables the A-link power management feature, which
* lets the system lower the power consumption in idle states.
diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h
index ed6700d00fe6..820f532f7c1c 100644
--- a/drivers/usb/host/pci-quirks.h
+++ b/drivers/usb/host/pci-quirks.h
@@ -5,6 +5,7 @@
void uhci_reset_hc(struct pci_dev *pdev, unsigned long base);
int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base);
int usb_amd_find_chipset_info(void);
+bool usb_amd_hang_symptom_quirk(void);
void usb_amd_dev_put(void);
void usb_amd_quirk_pll_disable(void);
void usb_amd_quirk_pll_enable(void);
--
1.9.0
Jiri Slaby
2014-03-22 10:46:15 UTC
Permalink
From: "Paul E. McKenney" <***@linux.vnet.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit c229828ca6bc62d6c654f64b1d1b8a9ebd8a56f3 upstream.

The rcu_try_advance_all_cbs() function is invoked on each attempted
entry to and every exit from idle. If this function determines that
there are callbacks ready to invoke, the caller will invoke the RCU
core, which in turn will result in a pair of context switches. If a
CPU enters and exits idle extremely frequently, this can result in
an excessive number of context switches and high CPU overhead.

This commit therefore causes rcu_try_advance_all_cbs() to throttle
itself, refusing to do work more than once per jiffy.

Reported-by: Tibor Billes <***@gmx.com>
Signed-off-by: Paul E. McKenney <***@linux.vnet.ibm.com>
Tested-by: Tibor Billes <***@gmx.com>
Reviewed-by: Josh Triplett <***@joshtriplett.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/rcutree.h | 2 ++
kernel/rcutree_plugin.h | 12 +++++++++---
2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index 5f97eab602cd..52be957c9fe2 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -104,6 +104,8 @@ struct rcu_dynticks {
/* idle-period nonlazy_posted snapshot. */
unsigned long last_accelerate;
/* Last jiffy CBs were accelerated. */
+ unsigned long last_advance_all;
+ /* Last jiffy CBs were all advanced. */
int tick_nohz_enabled_snap; /* Previously seen value from sysfs. */
#endif /* #ifdef CONFIG_RCU_FAST_NO_HZ */
};
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index d9cd0c2e34cb..511e6b47c594 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -1630,17 +1630,23 @@ module_param(rcu_idle_lazy_gp_delay, int, 0644);
extern int tick_nohz_active;

/*
- * Try to advance callbacks for all flavors of RCU on the current CPU.
- * Afterwards, if there are any callbacks ready for immediate invocation,
- * return true.
+ * Try to advance callbacks for all flavors of RCU on the current CPU, but
+ * only if it has been awhile since the last time we did so. Afterwards,
+ * if there are any callbacks ready for immediate invocation, return true.
*/
static bool rcu_try_advance_all_cbs(void)
{
bool cbs_ready = false;
struct rcu_data *rdp;
+ struct rcu_dynticks *rdtp = this_cpu_ptr(&rcu_dynticks);
struct rcu_node *rnp;
struct rcu_state *rsp;

+ /* Exit early if we advanced recently. */
+ if (jiffies == rdtp->last_advance_all)
+ return 0;
+ rdtp->last_advance_all = jiffies;
+
for_each_rcu_flavor(rsp) {
rdp = this_cpu_ptr(rsp->rda);
rnp = rdp->mynode;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:03 UTC
Permalink
From: Huang Rui <***@amd.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 22b4f0cd1d4d98f50213e9a37ead654e80b54b9d upstream.

This patch abstracts out a AMD chipset type which includes southbridge
generation and its revision. When os excutes usb_amd_find_chipset_info
routine to initialize AMD chipset type, driver will know which kind of
chipset is used.

This update has below benifits:
- Driver is able to confirm which southbridge generations and their
revision are used, with chipset detection once.
- To describe chipset generations with enumeration types brings better
readability.
- It's flexible to filter AMD platforms to implement new quirks in future.

Signed-off-by: Huang Rui <***@amd.com>
Cc: Andiry Xu <***@gmail.com>
Acked-by: Alan Stern <***@rowland.harvard.edu>
Acked-by: Sarah Sharp <***@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/host/pci-quirks.c | 104 ++++++++++++++++++++++++++++++++----------
1 file changed, 80 insertions(+), 24 deletions(-)

diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 08ef2829a7e2..daa1e5821dea 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -79,11 +79,30 @@
#define USB_INTEL_USB3_PSSEN 0xD8
#define USB_INTEL_USB3PRM 0xDC

+/*
+ * amd_chipset_gen values represent AMD different chipset generations
+ */
+enum amd_chipset_gen {
+ NOT_AMD_CHIPSET = 0,
+ AMD_CHIPSET_SB600,
+ AMD_CHIPSET_SB700,
+ AMD_CHIPSET_SB800,
+ AMD_CHIPSET_HUDSON2,
+ AMD_CHIPSET_BOLTON,
+ AMD_CHIPSET_YANGTZE,
+ AMD_CHIPSET_UNKNOWN,
+};
+
+struct amd_chipset_type {
+ enum amd_chipset_gen gen;
+ u8 rev;
+};
+
static struct amd_chipset_info {
struct pci_dev *nb_dev;
struct pci_dev *smbus_dev;
int nb_type;
- int sb_type;
+ struct amd_chipset_type sb_type;
int isoc_reqs;
int probe_count;
int probe_result;
@@ -91,6 +110,51 @@ static struct amd_chipset_info {

static DEFINE_SPINLOCK(amd_lock);

+/*
+ * amd_chipset_sb_type_init - initialize amd chipset southbridge type
+ *
+ * AMD FCH/SB generation and revision is identified by SMBus controller
+ * vendor, device and revision IDs.
+ *
+ * Returns: 1 if it is an AMD chipset, 0 otherwise.
+ */
+int amd_chipset_sb_type_init(struct amd_chipset_info *pinfo)
+{
+ u8 rev = 0;
+ pinfo->sb_type.gen = AMD_CHIPSET_UNKNOWN;
+
+ pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
+ PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
+ if (pinfo->smbus_dev) {
+ rev = pinfo->smbus_dev->revision;
+ if (rev >= 0x10 && rev <= 0x1f)
+ pinfo->sb_type.gen = AMD_CHIPSET_SB600;
+ else if (rev >= 0x30 && rev <= 0x3f)
+ pinfo->sb_type.gen = AMD_CHIPSET_SB700;
+ else if (rev >= 0x40 && rev <= 0x4f)
+ pinfo->sb_type.gen = AMD_CHIPSET_SB800;
+ } else {
+ pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
+ PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
+
+ if (!pinfo->smbus_dev) {
+ pinfo->sb_type.gen = NOT_AMD_CHIPSET;
+ return 0;
+ }
+
+ rev = pinfo->smbus_dev->revision;
+ if (rev >= 0x11 && rev <= 0x14)
+ pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2;
+ else if (rev >= 0x15 && rev <= 0x18)
+ pinfo->sb_type.gen = AMD_CHIPSET_BOLTON;
+ else if (rev >= 0x39 && rev <= 0x3a)
+ pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE;
+ }
+
+ pinfo->sb_type.rev = rev;
+ return 1;
+}
+
void sb800_prefetch(struct device *dev, int on)
{
u16 misc;
@@ -106,7 +170,6 @@ EXPORT_SYMBOL_GPL(sb800_prefetch);

int usb_amd_find_chipset_info(void)
{
- u8 rev = 0;
unsigned long flags;
struct amd_chipset_info info;
int ret;
@@ -122,27 +185,17 @@ int usb_amd_find_chipset_info(void)
memset(&info, 0, sizeof(info));
spin_unlock_irqrestore(&amd_lock, flags);

- info.smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 0x4385, NULL);
- if (info.smbus_dev) {
- rev = info.smbus_dev->revision;
- if (rev >= 0x40)
- info.sb_type = 1;
- else if (rev >= 0x30 && rev <= 0x3b)
- info.sb_type = 3;
- } else {
- info.smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
- 0x780b, NULL);
- if (!info.smbus_dev) {
- ret = 0;
- goto commit;
- }
-
- rev = info.smbus_dev->revision;
- if (rev >= 0x11 && rev <= 0x18)
- info.sb_type = 2;
+ if (!amd_chipset_sb_type_init(&info)) {
+ ret = 0;
+ goto commit;
}

- if (info.sb_type == 0) {
+ /* Below chipset generations needn't enable AMD PLL quirk */
+ if (info.sb_type.gen == AMD_CHIPSET_UNKNOWN ||
+ info.sb_type.gen == AMD_CHIPSET_SB600 ||
+ info.sb_type.gen == AMD_CHIPSET_YANGTZE ||
+ (info.sb_type.gen == AMD_CHIPSET_SB700 &&
+ info.sb_type.rev > 0x3b)) {
if (info.smbus_dev) {
pci_dev_put(info.smbus_dev);
info.smbus_dev = NULL;
@@ -229,7 +282,9 @@ static void usb_amd_quirk_pll(int disable)
}
}

- if (amd_chipset.sb_type == 1 || amd_chipset.sb_type == 2) {
+ if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB800 ||
+ amd_chipset.sb_type.gen == AMD_CHIPSET_HUDSON2 ||
+ amd_chipset.sb_type.gen == AMD_CHIPSET_BOLTON) {
outb_p(AB_REG_BAR_LOW, 0xcd6);
addr_low = inb_p(0xcd7);
outb_p(AB_REG_BAR_HIGH, 0xcd6);
@@ -240,7 +295,8 @@ static void usb_amd_quirk_pll(int disable)
outl_p(0x40, AB_DATA(addr));
outl_p(0x34, AB_INDX(addr));
val = inl_p(AB_DATA(addr));
- } else if (amd_chipset.sb_type == 3) {
+ } else if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 &&
+ amd_chipset.sb_type.rev <= 0x3b) {
pci_read_config_dword(amd_chipset.smbus_dev,
AB_REG_BAR_SB700, &addr);
outl(AX_INDXC, AB_INDX(addr));
@@ -353,7 +409,7 @@ void usb_amd_dev_put(void)
amd_chipset.nb_dev = NULL;
amd_chipset.smbus_dev = NULL;
amd_chipset.nb_type = 0;
- amd_chipset.sb_type = 0;
+ memset(&amd_chipset.sb_type, 0, sizeof(amd_chipset.sb_type));
amd_chipset.isoc_reqs = 0;
amd_chipset.probe_result = 0;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:09 UTC
Permalink
From: Thomas Gleixner <***@linutronix.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 0e576acbc1d9600cf2d9b4a141a2554639959d50 upstream.

If CONFIG_NO_HZ=n tick_nohz_get_sleep_length() returns NSEC_PER_SEC/HZ.

If CONFIG_NO_HZ=y and the nohz functionality is disabled via the
command line option "nohz=off" or not enabled due to missing hardware
support, then tick_nohz_get_sleep_length() returns 0. That happens
because ts->sleep_length is never set in that case.

Set it to NSEC_PER_SEC/HZ when the NOHZ mode is inactive.

Reported-by: Michal Hocko <***@suse.cz>
Reported-by: Borislav Petkov <***@alien8.de>
Signed-off-by: Thomas Gleixner <***@linutronix.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/time/tick-sched.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 3612fc77f834..d78253eb3b74 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -711,8 +711,10 @@ static bool can_stop_idle_tick(int cpu, struct tick_sched *ts)
return false;
}

- if (unlikely(ts->nohz_mode == NOHZ_MODE_INACTIVE))
+ if (unlikely(ts->nohz_mode == NOHZ_MODE_INACTIVE)) {
+ ts->sleep_length = (ktime_t) { .tv64 = NSEC_PER_SEC/HZ };
return false;
+ }

if (need_resched())
return false;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:06 UTC
Permalink
From: Jan Kara <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit a404d5576bbe586a1097a8bc2f32c5f22651b0aa upstream.

Currently each task sends BLK_TN_PROCESS event to the first traced
device it interacts with after a new trace is started. When there are
several traced devices and the task accesses more devices, this logic
can result in BLK_TN_PROCESS being sent several times to some devices
while it is never sent to other devices. Thus blkparse doesn't display
command name when parsing some blktrace files.

Fix the problem by sending BLK_TN_PROCESS event to all traced devices
when a task interacts with any of them.

Signed-off-by: Jan Kara <***@suse.cz>
Review-by: Jeff Moyer <***@redhat.com>
Signed-off-by: Jens Axboe <***@kernel.dk>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
include/linux/blktrace_api.h | 2 ++
kernel/trace/blktrace.c | 33 +++++++++++++++++++++++++++------
2 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index 7c2e030e72f1..a12f6ed91c84 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -5,6 +5,7 @@
#include <linux/relay.h>
#include <linux/compat.h>
#include <uapi/linux/blktrace_api.h>
+#include <linux/list.h>

#if defined(CONFIG_BLK_DEV_IO_TRACE)

@@ -23,6 +24,7 @@ struct blk_trace {
struct dentry *dir;
struct dentry *dropped_file;
struct dentry *msg_file;
+ struct list_head running_list;
atomic_t dropped;
};

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index b8b8560bfb95..7f727b34280d 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -26,6 +26,7 @@
#include <linux/export.h>
#include <linux/time.h>
#include <linux/uaccess.h>
+#include <linux/list.h>

#include <trace/events/block.h>

@@ -38,6 +39,9 @@ static unsigned int blktrace_seq __read_mostly = 1;
static struct trace_array *blk_tr;
static bool blk_tracer_enabled __read_mostly;

+static LIST_HEAD(running_trace_list);
+static __cacheline_aligned_in_smp DEFINE_SPINLOCK(running_trace_lock);
+
/* Select an alternative, minimalistic output than the original one */
#define TRACE_BLK_OPT_CLASSIC 0x1

@@ -107,10 +111,18 @@ record_it:
* Send out a notify for this process, if we haven't done so since a trace
* started
*/
-static void trace_note_tsk(struct blk_trace *bt, struct task_struct *tsk)
+static void trace_note_tsk(struct task_struct *tsk)
{
+ unsigned long flags;
+ struct blk_trace *bt;
+
tsk->btrace_seq = blktrace_seq;
- trace_note(bt, tsk->pid, BLK_TN_PROCESS, tsk->comm, sizeof(tsk->comm));
+ spin_lock_irqsave(&running_trace_lock, flags);
+ list_for_each_entry(bt, &running_trace_list, running_list) {
+ trace_note(bt, tsk->pid, BLK_TN_PROCESS, tsk->comm,
+ sizeof(tsk->comm));
+ }
+ spin_unlock_irqrestore(&running_trace_lock, flags);
}

static void trace_note_time(struct blk_trace *bt)
@@ -229,16 +241,15 @@ static void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
goto record_it;
}

+ if (unlikely(tsk->btrace_seq != blktrace_seq))
+ trace_note_tsk(tsk);
+
/*
* A word about the locking here - we disable interrupts to reserve
* some space in the relay per-cpu buffer, to prevent an irq
* from coming in and stepping on our toes.
*/
local_irq_save(flags);
-
- if (unlikely(tsk->btrace_seq != blktrace_seq))
- trace_note_tsk(bt, tsk);
-
t = relay_reserve(bt->rchan, sizeof(*t) + pdu_len);
if (t) {
sequence = per_cpu_ptr(bt->sequence, cpu);
@@ -477,6 +488,7 @@ int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
bt->dir = dir;
bt->dev = dev;
atomic_set(&bt->dropped, 0);
+ INIT_LIST_HEAD(&bt->running_list);

ret = -EIO;
bt->dropped_file = debugfs_create_file("dropped", 0444, dir, bt,
@@ -601,6 +613,9 @@ int blk_trace_startstop(struct request_queue *q, int start)
blktrace_seq++;
smp_mb();
bt->trace_state = Blktrace_running;
+ spin_lock_irq(&running_trace_lock);
+ list_add(&bt->running_list, &running_trace_list);
+ spin_unlock_irq(&running_trace_lock);

trace_note_time(bt);
ret = 0;
@@ -608,6 +623,9 @@ int blk_trace_startstop(struct request_queue *q, int start)
} else {
if (bt->trace_state == Blktrace_running) {
bt->trace_state = Blktrace_stopped;
+ spin_lock_irq(&running_trace_lock);
+ list_del_init(&bt->running_list);
+ spin_unlock_irq(&running_trace_lock);
relay_flush(bt->rchan);
ret = 0;
}
@@ -1472,6 +1490,9 @@ static int blk_trace_remove_queue(struct request_queue *q)
if (atomic_dec_and_test(&blk_probes_ref))
blk_unregister_tracepoints();

+ spin_lock_irq(&running_trace_lock);
+ list_del(&bt->running_list);
+ spin_unlock_irq(&running_trace_lock);
blk_trace_free(bt);
return 0;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:39 UTC
Permalink
From: Xin Long <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit 10ddceb22bab11dab10ba645c7df2e4a8e7a5db5 ]

when ip_tunnel process multicast packets, it may check if the packet is looped
back packet though 'rt_is_output_route(skb_rtable(skb))' in ip_tunnel_rcv(),
but before that , skb->_skb_refdst has been dropped in iptunnel_pull_header(),
so which leads to a panic.

fix the bug: https://bugzilla.kernel.org/show_bug.cgi?id=70681

Signed-off-by: Xin Long <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/ipv4/ip_tunnel_core.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index c31e3ad98ef2..ba22cc3a5a53 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -109,7 +109,6 @@ int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto)
secpath_reset(skb);
if (!skb->l4_rxhash)
skb->rxhash = 0;
- skb_dst_drop(skb);
skb->vlan_tci = 0;
skb_set_queue_mapping(skb, 0);
skb->pkt_type = PACKET_HOST;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:58 UTC
Permalink
From: Johannes Berg <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit cb664981607a6b5b3d670ad57bbda893b2528d96 upstream.

When a VHT network uses 20 or 40 MHz as per the HT operation
information, the channel center frequency segment 0 field in
the VHT operation information is reserved, so ignore it.

This fixes association with such networks when the AP puts 0
into the field, previously we'd disconnect due to an invalid
channel with the message
wlan0: AP VHT information is invalid, disable VHT

Fixes: f2d9d270c15ae ("mac80211: support VHT association")
Reported-by: Tim Nelson <***@gmail.com>
Signed-off-by: Johannes Berg <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/mac80211/mlme.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 223777bae02a..8d7f4abe65ba 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -282,6 +282,7 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
switch (vht_oper->chan_width) {
case IEEE80211_VHT_CHANWIDTH_USE_HT:
vht_chandef.width = chandef->width;
+ vht_chandef.center_freq1 = chandef->center_freq1;
break;
case IEEE80211_VHT_CHANWIDTH_80MHZ:
vht_chandef.width = NL80211_CHAN_WIDTH_80;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:14 UTC
Permalink
From: "Paul E. McKenney" <***@linux.vnet.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit c337f8f58ed7cf150651d232af8222421a71463d upstream.

If a non-lazy callback arrives on a CPU that has previously gone idle
with no non-lazy callbacks, invoke_rcu_core() forces the RCU core to
run. However, it does not update the conditions, which could result
in several closely spaced invocations of the RCU core, which in turn
could result in an excessively high context-switch rate and resulting
high overhead.

This commit therefore updates the ->all_lazy and ->nonlazy_posted_snap
fields to prevent closely spaced invocations.

Reported-by: Tibor Billes <***@gmx.com>
Signed-off-by: Paul E. McKenney <***@linux.vnet.ibm.com>
Tested-by: Tibor Billes <***@gmx.com>
Reviewed-by: Josh Triplett <***@joshtriplett.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/rcutree_plugin.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index fd71cef0d789..d9cd0c2e34cb 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -1739,6 +1739,8 @@ static void rcu_prepare_for_idle(int cpu)
*/
if (rdtp->all_lazy &&
rdtp->nonlazy_posted != rdtp->nonlazy_posted_snap) {
+ rdtp->all_lazy = false;
+ rdtp->nonlazy_posted_snap = rdtp->nonlazy_posted;
invoke_rcu_core();
return;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:05 UTC
Permalink
From: Huang Rui <***@amd.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 02c123ee99c793f65af2dbda17d5fe87d448f808 upstream.

Commit "usb: pci-quirks: refactor AMD quirk to abstract AMD chipset types"
introduced a new AMD chipset type to filter AMD platforms with different
chipsets.

According to a recent thread [1], this patch updates SB800 prefetch routine
in AMD PLL quirk. And make it use the new chipset type to represent SB800
generation.

[1] http://marc.info/?l=linux-usb&m=138012321616452&w=2

Signed-off-by: Huang Rui <***@amd.com>
Acked-by: Alan Stern <***@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <***@linuxfoundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/usb/host/ohci-pci.c | 14 +-------------
drivers/usb/host/pci-quirks.c | 8 ++++++++
drivers/usb/host/pci-quirks.h | 1 +
3 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index ec337c2bd5e0..659cde1ed1ea 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -150,28 +150,16 @@ static int ohci_quirk_nec(struct usb_hcd *hcd)
static int ohci_quirk_amd700(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- struct pci_dev *amd_smbus_dev;
- u8 rev;

if (usb_amd_find_chipset_info())
ohci->flags |= OHCI_QUIRK_AMD_PLL;

- amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
- PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
- if (!amd_smbus_dev)
- return 0;
-
- rev = amd_smbus_dev->revision;
-
/* SB800 needs pre-fetch fix */
- if ((rev >= 0x40) && (rev <= 0x4f)) {
+ if (usb_amd_prefetch_quirk()) {
ohci->flags |= OHCI_QUIRK_AMD_PREFETCH;
ohci_dbg(ohci, "enabled AMD prefetch quirk\n");
}

- pci_dev_put(amd_smbus_dev);
- amd_smbus_dev = NULL;
-
return 0;
}

diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 35111deede13..463156d03140 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -263,6 +263,14 @@ bool usb_amd_hang_symptom_quirk(void)
}
EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk);

+bool usb_amd_prefetch_quirk(void)
+{
+ usb_amd_find_chipset_info();
+ /* SB800 needs pre-fetch fix */
+ return amd_chipset.sb_type.gen == AMD_CHIPSET_SB800;
+}
+EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk);
+
/*
* The hardware normally enables the A-link power management feature, which
* lets the system lower the power consumption in idle states.
diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h
index 820f532f7c1c..638e88f7a28b 100644
--- a/drivers/usb/host/pci-quirks.h
+++ b/drivers/usb/host/pci-quirks.h
@@ -6,6 +6,7 @@ void uhci_reset_hc(struct pci_dev *pdev, unsigned long base);
int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base);
int usb_amd_find_chipset_info(void);
bool usb_amd_hang_symptom_quirk(void);
+bool usb_amd_prefetch_quirk(void);
void usb_amd_dev_put(void);
void usb_amd_quirk_pll_disable(void);
void usb_amd_quirk_pll_enable(void);
--
1.9.0
Jiri Slaby
2014-03-22 10:46:08 UTC
Permalink
From: Linus Torvalds <***@linux-foundation.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 5cdec2d833748fbd27d3682f7209225c504c79c5 upstream.

When debugging the read-only hugepage case, I was confused by the fact
that get_futex_key() did an access_ok() only for the non-shared futex
case, since the user address checking really isn't in any way specific
to the private key handling.

Now, it turns out that the shared key handling does effectively do the
equivalent checks inside get_user_pages_fast() (it doesn't actually
check the address range on x86, but does check the page protections for
being a user page). So it wasn't actually a bug, but the fact that we
treat the address differently for private and shared futexes threw me
for a loop.

Just move the check up, so that it gets done for both cases. Also, use
the 'rw' parameter for the type, even if it doesn't actually matter any
more (it's a historical artifact of the old racy i386 "page faults from
kernel space don't check write protections").

Cc: Thomas Gleixner <***@linutronix.de>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/futex.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 221a58fc62f7..231754863a87 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -251,6 +251,9 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw)
return -EINVAL;
address -= key->both.offset;

+ if (unlikely(!access_ok(rw, uaddr, sizeof(u32))))
+ return -EFAULT;
+
/*
* PROCESS_PRIVATE futexes are fast.
* As the mm cannot disappear under us and the 'key' only needs
@@ -259,8 +262,6 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw)
* but access_ok() should be faster than find_vma()
*/
if (!fshared) {
- if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))))
- return -EFAULT;
key->private.mm = mm;
key->private.address = address;
get_futex_key_refs(key);
--
1.9.0
Jiri Slaby
2014-03-22 10:46:11 UTC
Permalink
From: Bjorn Helgaas <***@google.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit fbeeb822f6f45cadf154d7b7cff1c13537cd799d upstream.

f41f064cf4 ("PCI: Workaround missing pci_set_master in pci drivers") made
pci_enable_bridge() turn on bus mastering if the driver hadn't done so
already. It also added a warning in this case. But there's no reason to
warn about it unless it's actually a problem to enable bus mastering here.

This patch drops the warning because I'm not aware of any such problem.

Signed-off-by: Bjorn Helgaas <***@google.com>
CC: Paul Bolle <***@tiscali.nl>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/pci/pci.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 863bc4bb4806..532991bd1dc2 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1166,10 +1166,8 @@ static void pci_enable_bridge(struct pci_dev *dev)
pci_enable_bridge(dev->bus->self);

if (pci_is_enabled(dev)) {
- if (!dev->is_busmaster) {
- dev_warn(&dev->dev, "driver skip pci_set_master, fix it!\n");
+ if (!dev->is_busmaster)
pci_set_master(dev);
- }
return;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:57 UTC
Permalink
From: Johannes Berg <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 963a1852fbac4f75a2d938fa2e734ef1e6d4c044 upstream.

The MLME code in mac80211 must track whether or not the AP changed
bandwidth, but if there's no change while tracking it shouldn't do
anything, otherwise regulatory updates can make it impossible to
connect to certain APs if the regulatory database doesn't match the
information from the AP. See the precise scenario described in the
code.

This still leaves some possible problems with CSA or if the AP
actually changed bandwidth, but those cases are less common and
won't completely prevent using it.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=70881

Reported-and-tested-by: Nate Carlson <***@natecarlson.com>
Signed-off-by: Johannes Berg <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/mac80211/mlme.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 86e4ad56b573..223777bae02a 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -331,6 +331,28 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
ret = 0;

out:
+ /*
+ * When tracking the current AP, don't do any further checks if the
+ * new chandef is identical to the one we're currently using for the
+ * connection. This keeps us from playing ping-pong with regulatory,
+ * without it the following can happen (for example):
+ * - connect to an AP with 80 MHz, world regdom allows 80 MHz
+ * - AP advertises regdom US
+ * - CRDA loads regdom US with 80 MHz prohibited (old database)
+ * - the code below detects an unsupported channel, downgrades, and
+ * we disconnect from the AP in the caller
+ * - disconnect causes CRDA to reload world regdomain and the game
+ * starts anew.
+ * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
+ *
+ * It seems possible that there are still scenarios with CSA or real
+ * bandwidth changes where a this could happen, but those cases are
+ * less common and wouldn't completely prevent using the AP.
+ */
+ if (tracking &&
+ cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
+ return ret;
+
/* don't print the message below for VHT mismatch if VHT is disabled */
if (ret & IEEE80211_STA_DISABLE_VHT)
vht_chandef = *chandef;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:48 UTC
Permalink
From: Johannes Weiner <***@cmpxchg.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 27329369c9ecf37771b2a65202cbf5578cff3331 upstream.

Jan Stancek reports manual page migration encountering allocation
failures after some pages when there is still plenty of memory free, and
bisected the problem down to commit 81c0a2bb515f ("mm: page_alloc: fair
zone allocator policy").

The problem is that GFP_THISNODE obeys the zone fairness allocation
batches on one hand, but doesn't reset them and wake kswapd on the other
hand. After a few of those allocations, the batches are exhausted and
the allocations fail.

Fixing this means either having GFP_THISNODE wake up kswapd, or
GFP_THISNODE not participating in zone fairness at all. The latter
seems safer as an acute bugfix, we can clean up later.

Reported-by: Jan Stancek <***@redhat.com>
Signed-off-by: Johannes Weiner <***@cmpxchg.org>
Acked-by: Rik van Riel <***@redhat.com>
Acked-by: Mel Gorman <***@suse.de>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
mm/page_alloc.c | 26 ++++++++++++++++++++++----
1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 317ea747d2cd..06f847933eeb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1217,6 +1217,15 @@ void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp)
}
local_irq_restore(flags);
}
+static bool gfp_thisnode_allocation(gfp_t gfp_mask)
+{
+ return (gfp_mask & GFP_THISNODE) == GFP_THISNODE;
+}
+#else
+static bool gfp_thisnode_allocation(gfp_t gfp_mask)
+{
+ return false;
+}
#endif

/*
@@ -1553,7 +1562,13 @@ again:
get_pageblock_migratetype(page));
}

- __mod_zone_page_state(zone, NR_ALLOC_BATCH, -(1 << order));
+ /*
+ * NOTE: GFP_THISNODE allocations do not partake in the kswapd
+ * aging protocol, so they can't be fair.
+ */
+ if (!gfp_thisnode_allocation(gfp_flags))
+ __mod_zone_page_state(zone, NR_ALLOC_BATCH, -(1 << order));
+
__count_zone_vm_events(PGALLOC, zone, 1 << order);
zone_statistics(preferred_zone, zone, gfp_flags);
local_irq_restore(flags);
@@ -1925,8 +1940,12 @@ zonelist_scan:
* ultimately fall back to remote zones that do not
* partake in the fairness round-robin cycle of this
* zonelist.
+ *
+ * NOTE: GFP_THISNODE allocations do not partake in
+ * the kswapd aging protocol, so they can't be fair.
*/
- if (alloc_flags & ALLOC_WMARK_LOW) {
+ if ((alloc_flags & ALLOC_WMARK_LOW) &&
+ !gfp_thisnode_allocation(gfp_mask)) {
if (zone_page_state(zone, NR_ALLOC_BATCH) <= 0)
continue;
if (!zone_local(preferred_zone, zone))
@@ -2492,8 +2511,7 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
* allowed per node queues are empty and that nodes are
* over allocated.
*/
- if (IS_ENABLED(CONFIG_NUMA) &&
- (gfp_mask & GFP_THISNODE) == GFP_THISNODE)
+ if (gfp_thisnode_allocation(gfp_mask))
goto nopage;

restart:
--
1.9.0
Jiri Slaby
2014-03-22 10:46:27 UTC
Permalink
From: Mel Gorman <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit c78e93630d15b5f5774213aad9bdc9f52473a89b upstream.

It has been reported on very large machines that show_mem is taking almost
5 minutes to display information. This is a serious problem if there is
an OOM storm. The bulk of the cost is in show_mem doing a very expensive
PFN walk to give us the following information

Total RAM: Also available as totalram_pages
Highmem pages: Also available as totalhigh_pages
Reserved pages: Can be inferred from the zone structure
Shared pages: PFN walk required
Unshared pages: PFN walk required
Quick pages: Per-cpu walk required

Only the shared/unshared pages requires a full PFN walk but that
information is useless. It is also inaccurate as page pins of unshared
pages would be accounted for as shared. Even if the information was
accurate, I'm struggling to think how the shared/unshared information
could be useful for debugging OOM conditions. Maybe it was useful before
rmap existed when reclaiming shared pages was costly but it is less
relevant today.

The PFN walk could be optimised a bit but why bother as the information is
useless. This patch deletes the PFN walker and infers the total RAM,
highmem and reserved pages count from struct zone. It omits the
shared/unshared page usage on the grounds that it is useless. It also
corrects the reporting of HighMem as HighMem/MovableOnly as ZONE_MOVABLE
has similar problems to HighMem with respect to lowmem/highmem exhaustion.

Signed-off-by: Mel Gorman <***@suse.de>
Cc: David Rientjes <***@google.com>
Acked-by: KOSAKI Motohiro <***@jp.fujitsu.com>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
lib/show_mem.c | 39 +++++++++++----------------------------
1 file changed, 11 insertions(+), 28 deletions(-)

diff --git a/lib/show_mem.c b/lib/show_mem.c
index b7c72311ad0c..5847a4921b8e 100644
--- a/lib/show_mem.c
+++ b/lib/show_mem.c
@@ -12,8 +12,7 @@
void show_mem(unsigned int filter)
{
pg_data_t *pgdat;
- unsigned long total = 0, reserved = 0, shared = 0,
- nonshared = 0, highmem = 0;
+ unsigned long total = 0, reserved = 0, highmem = 0;

printk("Mem-Info:\n");
show_free_areas(filter);
@@ -22,43 +21,27 @@ void show_mem(unsigned int filter)
return;

for_each_online_pgdat(pgdat) {
- unsigned long i, flags;
+ unsigned long flags;
+ int zoneid;

pgdat_resize_lock(pgdat, &flags);
- for (i = 0; i < pgdat->node_spanned_pages; i++) {
- struct page *page;
- unsigned long pfn = pgdat->node_start_pfn + i;
-
- if (unlikely(!(i % MAX_ORDER_NR_PAGES)))
- touch_nmi_watchdog();
-
- if (!pfn_valid(pfn))
+ for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
+ struct zone *zone = &pgdat->node_zones[zoneid];
+ if (!populated_zone(zone))
continue;

- page = pfn_to_page(pfn);
-
- if (PageHighMem(page))
- highmem++;
+ total += zone->present_pages;
+ reserved = zone->present_pages - zone->managed_pages;

- if (PageReserved(page))
- reserved++;
- else if (page_count(page) == 1)
- nonshared++;
- else if (page_count(page) > 1)
- shared += page_count(page) - 1;
-
- total++;
+ if (is_highmem_idx(zoneid))
+ highmem += zone->present_pages;
}
pgdat_resize_unlock(pgdat, &flags);
}

printk("%lu pages RAM\n", total);
-#ifdef CONFIG_HIGHMEM
- printk("%lu pages HighMem\n", highmem);
-#endif
+ printk("%lu pages HighMem/MovableOnly\n", highmem);
printk("%lu pages reserved\n", reserved);
- printk("%lu pages shared\n", shared);
- printk("%lu pages non-shared\n", nonshared);
#ifdef CONFIG_QUICKLIST
printk("%lu pages in pagetable cache\n",
quicklist_total_size());
--
1.9.0
Jiri Slaby
2014-03-22 10:47:02 UTC
Permalink
From: Felix Fietkau <***@openwrt.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 558ff225de80ac95b132d3a115ddadcd64498b4f upstream.

When passing tx frames to the U-APSD queue for powersave poll responses,
the ath_atx_tid pointer needs to be passed to ath_tx_setup_buffer for
proper sequence number accounting.

This fixes high latency and connection stability issues with ath9k
running as AP and a few kinds of mobile phones as client, when PS-Poll
is heavily used

Signed-off-by: Felix Fietkau <***@openwrt.org>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/ath/ath9k/xmit.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 32891564ed67..ba39178a94ab 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2201,14 +2201,15 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
txq->stopped = true;
}

+ if (txctl->an)
+ tid = ath_get_skb_tid(sc, txctl->an, skb);
+
if (info->flags & IEEE80211_TX_CTL_PS_RESPONSE) {
ath_txq_unlock(sc, txq);
txq = sc->tx.uapsdq;
ath_txq_lock(sc, txq);
} else if (txctl->an &&
ieee80211_is_data_present(hdr->frame_control)) {
- tid = ath_get_skb_tid(sc, txctl->an, skb);
-
WARN_ON(tid->ac->txq != txctl->txq);

if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
--
1.9.0
Jiri Slaby
2014-03-22 10:46:29 UTC
Permalink
From: Waiman Long <***@hp.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit a767f680e34bf14a36fefbbb6d85783eef99fd57 upstream.

Currently, the ebitmap_node structure has a fixed size of 32 bytes. On
a 32-bit system, the overhead is 8 bytes, leaving 24 bytes for being
used as bitmaps. The overhead ratio is 1/4.

On a 64-bit system, the overhead is 16 bytes. Therefore, only 16 bytes
are left for bitmap purpose and the overhead ratio is 1/2. With a
3.8.2 kernel, a boot-up operation will cause the ebitmap_get_bit()
function to be called about 9 million times. The average number of
ebitmap_node traversal is about 3.7.

This patch increases the size of the ebitmap_node structure to 64
bytes for 64-bit system to keep the overhead ratio at 1/4. This may
also improve performance a little bit by making node to node traversal
less frequent (< 2) as more bits are available in each node.

Signed-off-by: Waiman Long <***@hp.com>
Acked-by: Stephen Smalley <***@tycho.nsa.gov>
Signed-off-by: Paul Moore <***@redhat.com>
Signed-off-by: Eric Paris <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
security/selinux/ss/ebitmap.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/security/selinux/ss/ebitmap.h b/security/selinux/ss/ebitmap.h
index e7eb3a9c5ab7..712c8a7b8e8b 100644
--- a/security/selinux/ss/ebitmap.h
+++ b/security/selinux/ss/ebitmap.h
@@ -16,7 +16,13 @@

#include <net/netlabel.h>

-#define EBITMAP_UNIT_NUMS ((32 - sizeof(void *) - sizeof(u32)) \
+#ifdef CONFIG_64BIT
+#define EBITMAP_NODE_SIZE 64
+#else
+#define EBITMAP_NODE_SIZE 32
+#endif
+
+#define EBITMAP_UNIT_NUMS ((EBITMAP_NODE_SIZE-sizeof(void *)-sizeof(u32))\
/ sizeof(unsigned long))
#define EBITMAP_UNIT_SIZE BITS_PER_LONG
#define EBITMAP_SIZE (EBITMAP_UNIT_NUMS * EBITMAP_UNIT_SIZE)
--
1.9.0
Jiri Slaby
2014-03-22 10:46:40 UTC
Permalink
From: Daniel Borkmann <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit ec0223ec48a90cb605244b45f7c62de856403729 ]

RFC4895 introduced AUTH chunks for SCTP; during the SCTP
handshake RANDOM; CHUNKS; HMAC-ALGO are negotiated (CHUNKS
being optional though):

---------- INIT[RANDOM; CHUNKS; HMAC-ALGO] ---------->
<------- INIT-ACK[RANDOM; CHUNKS; HMAC-ALGO] ---------
-------------------- COOKIE-ECHO -------------------->
<-------------------- COOKIE-ACK ---------------------

A special case is when an endpoint requires COOKIE-ECHO
chunks to be authenticated:

---------- INIT[RANDOM; CHUNKS; HMAC-ALGO] ---------->
<------- INIT-ACK[RANDOM; CHUNKS; HMAC-ALGO] ---------
------------------ AUTH; COOKIE-ECHO ---------------->
<-------------------- COOKIE-ACK ---------------------

RFC4895, section 6.3. Receiving Authenticated Chunks says:

The receiver MUST use the HMAC algorithm indicated in
the HMAC Identifier field. If this algorithm was not
specified by the receiver in the HMAC-ALGO parameter in
the INIT or INIT-ACK chunk during association setup, the
AUTH chunk and all the chunks after it MUST be discarded
and an ERROR chunk SHOULD be sent with the error cause
defined in Section 4.1. [...] If no endpoint pair shared
key has been configured for that Shared Key Identifier,
all authenticated chunks MUST be silently discarded. [...]

When an endpoint requires COOKIE-ECHO chunks to be
authenticated, some special procedures have to be followed
because the reception of a COOKIE-ECHO chunk might result
in the creation of an SCTP association. If a packet arrives
containing an AUTH chunk as a first chunk, a COOKIE-ECHO
chunk as the second chunk, and possibly more chunks after
them, and the receiver does not have an STCB for that
packet, then authentication is based on the contents of
the COOKIE-ECHO chunk. In this situation, the receiver MUST
authenticate the chunks in the packet by using the RANDOM
parameters, CHUNKS parameters and HMAC_ALGO parameters
obtained from the COOKIE-ECHO chunk, and possibly a local
shared secret as inputs to the authentication procedure
specified in Section 6.3. If authentication fails, then
the packet is discarded. If the authentication is successful,
the COOKIE-ECHO and all the chunks after the COOKIE-ECHO
MUST be processed. If the receiver has an STCB, it MUST
process the AUTH chunk as described above using the STCB
from the existing association to authenticate the
COOKIE-ECHO chunk and all the chunks after it. [...]

Commit bbd0d59809f9 introduced the possibility to receive
and verification of AUTH chunk, including the edge case for
authenticated COOKIE-ECHO. On reception of COOKIE-ECHO,
the function sctp_sf_do_5_1D_ce() handles processing,
unpacks and creates a new association if it passed sanity
checks and also tests for authentication chunks being
present. After a new association has been processed, it
invokes sctp_process_init() on the new association and
walks through the parameter list it received from the INIT
chunk. It checks SCTP_PARAM_RANDOM, SCTP_PARAM_HMAC_ALGO
and SCTP_PARAM_CHUNKS, and copies them into asoc->peer
meta data (peer_random, peer_hmacs, peer_chunks) in case
sysctl -w net.sctp.auth_enable=1 is set. If in INIT's
SCTP_PARAM_SUPPORTED_EXT parameter SCTP_CID_AUTH is set,
peer_random != NULL and peer_hmacs != NULL the peer is to be
assumed asoc->peer.auth_capable=1, in any other case
asoc->peer.auth_capable=0.

Now, if in sctp_sf_do_5_1D_ce() chunk->auth_chunk is
available, we set up a fake auth chunk and pass that on to
sctp_sf_authenticate(), which at latest in
sctp_auth_calculate_hmac() reliably dereferences a NULL pointer
at position 0..0008 when setting up the crypto key in
crypto_hash_setkey() by using asoc->asoc_shared_key that is
NULL as condition key_id == asoc->active_key_id is true if
the AUTH chunk was injected correctly from remote. This
happens no matter what net.sctp.auth_enable sysctl says.

The fix is to check for net->sctp.auth_enable and for
asoc->peer.auth_capable before doing any operations like
sctp_sf_authenticate() as no key is activated in
sctp_auth_asoc_init_active_key() for each case.

Now as RFC4895 section 6.3 states that if the used HMAC-ALGO
passed from the INIT chunk was not used in the AUTH chunk, we
SHOULD send an error; however in this case it would be better
to just silently discard such a maliciously prepared handshake
as we didn't even receive a parameter at all. Also, as our
endpoint has no shared key configured, section 6.3 says that
MUST silently discard, which we are doing from now onwards.

Before calling sctp_sf_pdiscard(), we need not only to free
the association, but also the chunk->auth_chunk skb, as
commit bbd0d59809f9 created a skb clone in that case.

I have tested this locally by using netfilter's nfqueue and
re-injecting packets into the local stack after maliciously
modifying the INIT chunk (removing RANDOM; HMAC-ALGO param)
and the SCTP packet containing the COOKIE_ECHO (injecting
AUTH chunk before COOKIE_ECHO). Fixed with this patch applied.

Fixes: bbd0d59809f9 ("[SCTP]: Implement the receive and verification of AUTH chunk")
Signed-off-by: Daniel Borkmann <***@redhat.com>
Cc: Vlad Yasevich <***@gmail.com>
Cc: Neil Horman <***@tuxdriver.com>
Acked-by: Vlad Yasevich <***@gmail.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/sctp/sm_statefuns.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index dfe3f36ff2aa..56ebe71cfe13 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -759,6 +759,13 @@ sctp_disposition_t sctp_sf_do_5_1D_ce(struct net *net,
struct sctp_chunk auth;
sctp_ierror_t ret;

+ /* Make sure that we and the peer are AUTH capable */
+ if (!net->sctp.auth_enable || !new_asoc->peer.auth_capable) {
+ kfree_skb(chunk->auth_chunk);
+ sctp_association_free(new_asoc);
+ return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
+ }
+
/* set-up our fake chunk so that we can process it */
auth.skb = chunk->auth_chunk;
auth.asoc = chunk->asoc;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:51 UTC
Permalink
From: Al Viro <***@zeniv.linux.org.uk>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1b56e98990bcdbb20b9fab163654b9315bf158e8 upstream.

Signed-off-by: Al Viro <***@zeniv.linux.org.uk>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/ocfs2/file.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index d71903c6068b..f07941160515 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2371,8 +2371,8 @@ out_dio:

if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) ||
((file->f_flags & O_DIRECT) && !direct_io)) {
- ret = filemap_fdatawrite_range(file->f_mapping, pos,
- pos + count - 1);
+ ret = filemap_fdatawrite_range(file->f_mapping, *ppos,
+ *ppos + count - 1);
if (ret < 0)
written = ret;

@@ -2385,8 +2385,8 @@ out_dio:
}

if (!ret)
- ret = filemap_fdatawait_range(file->f_mapping, pos,
- pos + count - 1);
+ ret = filemap_fdatawait_range(file->f_mapping, *ppos,
+ *ppos + count - 1);
}

/*
--
1.9.0
Jiri Slaby
2014-03-22 10:46:55 UTC
Permalink
From: Felix Fietkau <***@openwrt.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1bf4bbb4024dcdab5e57634dd8ae1072d42a53ac upstream.

Improves reliability of wifi connections with WPA, since authentication
frames are prioritized over normal traffic and also typically exempt
from aggregation.

Signed-off-by: Felix Fietkau <***@openwrt.org>
Signed-off-by: Johannes Berg <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/mac80211/wme.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index afba19cb6f87..a282fddf8b00 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -153,6 +153,11 @@ u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
return IEEE80211_AC_BE;
}

+ if (skb->protocol == sdata->control_port_protocol) {
+ skb->priority = 7;
+ return ieee80211_downgrade_queue(sdata, skb);
+ }
+
/* use the data classifier to determine what 802.1d tag the
* data frame has */
skb->priority = cfg80211_classify8021d(skb);
--
1.9.0
Jiri Slaby
2014-03-22 10:46:56 UTC
Permalink
From: Emmanuel Grumbach <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1d147bfa64293b2723c4fec50922168658e613ba upstream.

There is a race between the TX path and the STA wakeup: while
a station is sleeping, mac80211 buffers frames until it wakes
up, then the frames are transmitted. However, the RX and TX
path are concurrent, so the packet indicating wakeup can be
processed while a packet is being transmitted.

This can lead to a situation where the buffered frames list
is emptied on the one side, while a frame is being added on
the other side, as the station is still seen as sleeping in
the TX path.

As a result, the newly added frame will not be send anytime
soon. It might be sent much later (and out of order) when the
station goes to sleep and wakes up the next time.

Additionally, it can lead to the crash below.

Fix all this by synchronising both paths with a new lock.
Both path are not fastpath since they handle PS situations.

In a later patch we'll remove the extra skb queue locks to
reduce locking overhead.

BUG: unable to handle kernel
NULL pointer dereference at 000000b0
IP: [<ff6f1791>] ieee80211_report_used_skb+0x11/0x3e0 [mac80211]
*pde = 00000000
Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
EIP: 0060:[<ff6f1791>] EFLAGS: 00210282 CPU: 1
EIP is at ieee80211_report_used_skb+0x11/0x3e0 [mac80211]
EAX: e5900da0 EBX: 00000000 ECX: 00000001 EDX: 00000000
ESI: e41d00c0 EDI: e5900da0 EBP: ebe458e4 ESP: ebe458b0
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
CR0: 8005003b CR2: 000000b0 CR3: 25a78000 CR4: 000407d0
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: ffff0ff0 DR7: 00000400
Process iperf (pid: 3934, ti=ebe44000 task=e757c0b0 task.ti=ebe44000)
iwlwifi 0000:02:00.0: I iwl_pcie_enqueue_hcmd Sending command LQ_CMD (#4e), seq: 0x0903, 92 bytes at 3[3]:9
Stack:
e403b32c ebe458c4 00200002 00200286 e403b338 ebe458cc c10960bb e5900da0
ff76a6ec ebe458d8 00000000 e41d00c0 e5900da0 ebe458f0 ff6f1b75 e403b210
ebe4598c ff723dc1 00000000 ff76a6ec e597c978 e403b758 00000002 00000002
Call Trace:
[<ff6f1b75>] ieee80211_free_txskb+0x15/0x20 [mac80211]
[<ff723dc1>] invoke_tx_handlers+0x1661/0x1780 [mac80211]
[<ff7248a5>] ieee80211_tx+0x75/0x100 [mac80211]
[<ff7249bf>] ieee80211_xmit+0x8f/0xc0 [mac80211]
[<ff72550e>] ieee80211_subif_start_xmit+0x4fe/0xe20 [mac80211]
[<c149ef70>] dev_hard_start_xmit+0x450/0x950
[<c14b9aa9>] sch_direct_xmit+0xa9/0x250
[<c14b9c9b>] __qdisc_run+0x4b/0x150
[<c149f732>] dev_queue_xmit+0x2c2/0xca0

Reported-by: Yaara Rozenblum <***@intel.com>
Signed-off-by: Emmanuel Grumbach <***@intel.com>
Reviewed-by: Stanislaw Gruszka <***@redhat.com>
[reword commit log, use a separate lock]
Signed-off-by: Johannes Berg <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/mac80211/sta_info.c | 4 ++++
net/mac80211/sta_info.h | 7 +++----
net/mac80211/tx.c | 15 +++++++++++++++
3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index aeb967a0aeed..662a620d73f2 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -340,6 +340,7 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
return NULL;

spin_lock_init(&sta->lock);
+ spin_lock_init(&sta->ps_lock);
INIT_WORK(&sta->drv_unblock_wk, sta_unblock);
INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
mutex_init(&sta->ampdu_mlme.mtx);
@@ -1049,6 +1050,8 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)

skb_queue_head_init(&pending);

+ /* sync with ieee80211_tx_h_unicast_ps_buf */
+ spin_lock(&sta->ps_lock);
/* Send all buffered frames to the station */
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
int count = skb_queue_len(&pending), tmp;
@@ -1068,6 +1071,7 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
}

ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta);
+ spin_unlock(&sta->ps_lock);

local->total_ps_buffered -= buffered;

diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 4208dbd5861f..492d59cbf289 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -245,6 +245,7 @@ struct sta_ampdu_mlme {
* @drv_unblock_wk: used for driver PS unblocking
* @listen_interval: listen interval of this station, when we're acting as AP
* @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
+ * @ps_lock: used for powersave (when mac80211 is the AP) related locking
* @ps_tx_buf: buffers (per AC) of frames to transmit to this station
* when it leaves power saving state or polls
* @tx_filtered: buffers (per AC) of frames we already tried to
@@ -328,10 +329,8 @@ struct sta_info {
/* use the accessors defined below */
unsigned long _flags;

- /*
- * STA powersave frame queues, no more than the internal
- * locking required.
- */
+ /* STA powersave lock and frame queues */
+ spinlock_t ps_lock;
struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
unsigned long driver_buffered_tids;
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 81dca92176c7..d6a47e76efff 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -477,6 +477,20 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
sta->sta.addr, sta->sta.aid, ac);
if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
purge_old_ps_buffers(tx->local);
+
+ /* sync with ieee80211_sta_ps_deliver_wakeup */
+ spin_lock(&sta->ps_lock);
+ /*
+ * STA woke up the meantime and all the frames on ps_tx_buf have
+ * been queued to pending queue. No reordering can happen, go
+ * ahead and Tx the packet.
+ */
+ if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
+ !test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
+ spin_unlock(&sta->ps_lock);
+ return TX_CONTINUE;
+ }
+
if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
ps_dbg(tx->sdata,
@@ -490,6 +504,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
info->control.vif = &tx->sdata->vif;
info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
+ spin_unlock(&sta->ps_lock);

if (!timer_pending(&local->sta_cleanup))
mod_timer(&local->sta_cleanup,
--
1.9.0
Jiri Slaby
2014-03-22 10:46:47 UTC
Permalink
From: Minchan Kim <***@kernel.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit db5d711e2db776f18219b033e5dc4fb7e4264dd7 upstream.

zram_meta_alloc could fail so caller should check it. Otherwise, your
system will hang.

Signed-off-by: Minchan Kim <***@kernel.org>
Acked-by: Jerome Marchand <***@redhat.com>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/staging/zram/zram_drv.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c
index d7ac040e0dc1..d02088f7dc33 100644
--- a/drivers/staging/zram/zram_drv.c
+++ b/drivers/staging/zram/zram_drv.c
@@ -621,6 +621,8 @@ static ssize_t disksize_store(struct device *dev,

disksize = PAGE_ALIGN(disksize);
meta = zram_meta_alloc(disksize);
+ if (!meta)
+ return -ENOMEM;
down_write(&zram->init_lock);
if (zram->init_done) {
up_write(&zram->init_lock);
--
1.9.0
Jiri Slaby
2014-03-22 10:46:35 UTC
Permalink
From: Hannes Frederic Sowa <***@stressinduktion.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit 916e4cf46d0204806c062c8c6c4d1f633852c5b6 ]

Currently we generate a new fragmentation id on UFO segmentation. It
is pretty hairy to identify the correct net namespace and dst there.
Especially tunnels use IFF_XMIT_DST_RELEASE and thus have no skb_dst
available at all.

This causes unreliable or very predictable ipv6 fragmentation id
generation while segmentation.

Luckily we already have pregenerated the ip6_frag_id in
ip6_ufo_append_data and can use it here.

Signed-off-by: Hannes Frederic Sowa <***@stressinduktion.org>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/ipv6/udp_offload.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c
index 06556d6e1a4d..ab4569df9cef 100644
--- a/net/ipv6/udp_offload.c
+++ b/net/ipv6/udp_offload.c
@@ -111,7 +111,7 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);
fptr->nexthdr = nexthdr;
fptr->reserved = 0;
- ipv6_select_ident(fptr, (struct rt6_info *)skb_dst(skb));
+ fptr->identification = skb_shinfo(skb)->ip6_frag_id;

/* Fragment the skb. ipv6 header and the remaining fields of the
* fragment header are updated in ipv6_gso_segment()
--
1.9.0
Jiri Slaby
2014-03-22 10:46:32 UTC
Permalink
From: Eric Dumazet <***@google.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit f5ddcbbb40aa0ba7fbfe22355d287603dbeeaaac ]

This patch fixes two bugs in fastopen :

1) The tcp_sendmsg(..., @size) argument was ignored.

Code was relying on user not fooling the kernel with iovec mismatches

2) When MTU is about 64KB, tcp_send_syn_data() attempts order-5
allocations, which are likely to fail when memory gets fragmented.

Fixes: 783237e8daf13 ("net-tcp: Fast Open client - sending SYN-data")
Signed-off-by: Eric Dumazet <***@google.com>
Cc: Yuchung Cheng <***@google.com>
Acked-by: Yuchung Cheng <***@google.com>
Tested-by: Yuchung Cheng <***@google.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
include/net/tcp.h | 3 ++-
net/ipv4/tcp.c | 8 +++++---
net/ipv4/tcp_output.c | 7 ++++++-
3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index b1aa324c5e65..fa3d50c4b0c7 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1303,7 +1303,8 @@ struct tcp_fastopen_request {
/* Fast Open cookie. Size 0 means a cookie request */
struct tcp_fastopen_cookie cookie;
struct msghdr *data; /* data in MSG_FASTOPEN */
- u16 copied; /* queued in tcp_connect() */
+ size_t size;
+ int copied; /* queued in tcp_connect() */
};
void tcp_free_fastopen_req(struct tcp_sock *tp);

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index be5246e1d5b6..531ab5721d79 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1000,7 +1000,8 @@ void tcp_free_fastopen_req(struct tcp_sock *tp)
}
}

-static int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, int *size)
+static int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg,
+ int *copied, size_t size)
{
struct tcp_sock *tp = tcp_sk(sk);
int err, flags;
@@ -1015,11 +1016,12 @@ static int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, int *size)
if (unlikely(tp->fastopen_req == NULL))
return -ENOBUFS;
tp->fastopen_req->data = msg;
+ tp->fastopen_req->size = size;

flags = (msg->msg_flags & MSG_DONTWAIT) ? O_NONBLOCK : 0;
err = __inet_stream_connect(sk->sk_socket, msg->msg_name,
msg->msg_namelen, flags);
- *size = tp->fastopen_req->copied;
+ *copied = tp->fastopen_req->copied;
tcp_free_fastopen_req(tp);
return err;
}
@@ -1039,7 +1041,7 @@ int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,

flags = msg->msg_flags;
if (flags & MSG_FASTOPEN) {
- err = tcp_sendmsg_fastopen(sk, msg, &copied_syn);
+ err = tcp_sendmsg_fastopen(sk, msg, &copied_syn, size);
if (err == -EINPROGRESS && copied_syn > 0)
goto out;
else if (err)
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index fb8227a8c004..e088932bcfae 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2902,7 +2902,12 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn)
space = __tcp_mtu_to_mss(sk, inet_csk(sk)->icsk_pmtu_cookie) -
MAX_TCP_OPTION_SPACE;

- syn_data = skb_copy_expand(syn, skb_headroom(syn), space,
+ space = min_t(size_t, space, fo->size);
+
+ /* limit to order-0 allocations */
+ space = min_t(size_t, space, SKB_MAX_HEAD(MAX_TCP_HEADER));
+
+ syn_data = skb_copy_expand(syn, MAX_TCP_HEADER, space,
sk->sk_allocation);
if (syn_data == NULL)
goto fallback;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:52 UTC
Permalink
From: Hugh Dickins <***@google.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ce48225fe3b1b0d1fc9fceb96ac3d8a879e45114 upstream.

Commit 0eef615665ed ("memcg: fix css reference leak and endless loop in
mem_cgroup_iter") got the interaction with the commit a few before it
d8ad30559715 ("mm/memcg: iteration skip memcgs not yet fully
initialized") slightly wrong, and we didn't notice at the time.

It's elusive, and harder to get than the original, but for a couple of
days before rc1, I several times saw a endless loop similar to that
supposedly being fixed.

This time it was a tighter loop in __mem_cgroup_iter_next(): because we
can get here when our root has already been offlined, and the ordering
of conditions was such that we then just cycled around forever.

Fixes: 0eef615665ed ("memcg: fix css reference leak and endless loop in mem_cgroup_iter").
Signed-off-by: Hugh Dickins <***@google.com>
Acked-by: Michal Hocko <***@suse.cz>
Cc: Johannes Weiner <***@cmpxchg.org>
Cc: Greg Thelen <***@google.com>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
mm/memcontrol.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a3be835d999f..15429b92ff98 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1089,8 +1089,8 @@ skip_node:
* skipping css reference should be safe.
*/
if (next_css) {
- if ((next_css->flags & CSS_ONLINE) &&
- (next_css == &root->css || css_tryget(next_css)))
+ if ((next_css == &root->css) ||
+ ((next_css->flags & CSS_ONLINE) && css_tryget(next_css)))
return mem_cgroup_from_css(next_css);

prev_css = next_css;
--
1.9.0
Jiri Slaby
2014-03-22 10:47:16 UTC
Permalink
From: Takashi Iwai <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e805ca8b0a9b6c91099c0eaa4b160a1196a4ae25 upstream.

Logitech C500 (046d:0807) needs the same workaround like other
Logitech Webcams.

Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/usb/mixer.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 95558ef4a7a0..be4db47cb2d9 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -883,6 +883,7 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
}
break;

+ case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */
case USB_ID(0x046d, 0x0808):
case USB_ID(0x046d, 0x0809):
case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
--
1.9.0
Jiri Slaby
2014-03-22 10:47:06 UTC
Permalink
From: Johannes Berg <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 143582c6847cb285b361804c613127c25de60ca4 upstream.

Only the first packet is currently handled correctly, but then
all others are assumed to have failed which is problematic. Fix
this, marking them all successful instead (since if they're not
then the firmware will have transmitted them as single frames.)

This fixes the lost packet reporting.

Also do a tiny variable scoping cleanup.

Signed-off-by: Johannes Berg <***@intel.com>
[Add the dvm part]
Signed-off-by: Emmanuel Grumbach <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/iwlwifi/dvm/tx.c | 14 +++++++++-----
drivers/net/wireless/iwlwifi/mvm/tx.c | 18 +++++++++---------
2 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/dvm/tx.c b/drivers/net/wireless/iwlwifi/dvm/tx.c
index 1fef5240e6ad..e219e761f48b 100644
--- a/drivers/net/wireless/iwlwifi/dvm/tx.c
+++ b/drivers/net/wireless/iwlwifi/dvm/tx.c
@@ -1291,8 +1291,6 @@ int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
struct iwl_ht_agg *agg;
struct sk_buff_head reclaimed_skbs;
- struct ieee80211_tx_info *info;
- struct ieee80211_hdr *hdr;
struct sk_buff *skb;
int sta_id;
int tid;
@@ -1379,22 +1377,28 @@ int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
freed = 0;

skb_queue_walk(&reclaimed_skbs, skb) {
- hdr = (struct ieee80211_hdr *)skb->data;
+ struct ieee80211_hdr *hdr = (void *)skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);

if (ieee80211_is_data_qos(hdr->frame_control))
freed++;
else
WARN_ON_ONCE(1);

- info = IEEE80211_SKB_CB(skb);
iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);

+ memset(&info->status, 0, sizeof(info->status));
+ /* Packet was transmitted successfully, failures come as single
+ * frames because before failing a frame the firmware transmits
+ * it without aggregation at least once.
+ */
+ info->flags |= IEEE80211_TX_STAT_ACK;
+
if (freed == 1) {
/* this is the first skb we deliver in this batch */
/* put the rate scaling data there */
info = IEEE80211_SKB_CB(skb);
memset(&info->status, 0, sizeof(info->status));
- info->flags |= IEEE80211_TX_STAT_ACK;
info->flags |= IEEE80211_TX_STAT_AMPDU;
info->status.ampdu_ack_len = ba_resp->txed_2_done;
info->status.ampdu_len = ba_resp->txed;
diff --git a/drivers/net/wireless/iwlwifi/mvm/tx.c b/drivers/net/wireless/iwlwifi/mvm/tx.c
index e05440d90319..f41add9c8093 100644
--- a/drivers/net/wireless/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/tx.c
@@ -819,16 +819,12 @@ int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
struct sk_buff_head reclaimed_skbs;
struct iwl_mvm_tid_data *tid_data;
- struct ieee80211_tx_info *info;
struct ieee80211_sta *sta;
struct iwl_mvm_sta *mvmsta;
- struct ieee80211_hdr *hdr;
struct sk_buff *skb;
int sta_id, tid, freed;
-
/* "flow" corresponds to Tx queue */
u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
-
/* "ssn" is start of block-ack Tx window, corresponds to index
* (in Tx queue's circular buffer) of first TFD/frame in window */
u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
@@ -885,22 +881,26 @@ int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
freed = 0;

skb_queue_walk(&reclaimed_skbs, skb) {
- hdr = (struct ieee80211_hdr *)skb->data;
+ struct ieee80211_hdr *hdr = (void *)skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);

if (ieee80211_is_data_qos(hdr->frame_control))
freed++;
else
WARN_ON_ONCE(1);

- info = IEEE80211_SKB_CB(skb);
iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);

+ memset(&info->status, 0, sizeof(info->status));
+ /* Packet was transmitted successfully, failures come as single
+ * frames because before failing a frame the firmware transmits
+ * it without aggregation at least once.
+ */
+ info->flags |= IEEE80211_TX_STAT_ACK;
+
if (freed == 1) {
/* this is the first skb we deliver in this batch */
/* put the rate scaling data there */
- info = IEEE80211_SKB_CB(skb);
- memset(&info->status, 0, sizeof(info->status));
- info->flags |= IEEE80211_TX_STAT_ACK;
info->flags |= IEEE80211_TX_STAT_AMPDU;
info->status.ampdu_ack_len = ba_notif->txed_2_done;
info->status.ampdu_len = ba_notif->txed;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:43 UTC
Permalink
From: Florian Westphal <***@strlen.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 8c27bd75f04fb9cb70c69c3cfe24f4e6d8e15906 upstream.

We currently accept cookies that were created less than 4 minutes ago
(ie, cookies with counter delta 0-3). Combined with the 8 mss table
values, this yields 32 possible values (out of 2**32) that will be valid.

Reducing the lifetime to < 2 minutes halves the guessing chance while
still providing a large enough period.

While at it, get rid of jiffies value -- they overflow too quickly on
32 bit platforms.

getnstimeofday is used to create a counter that increments every 64s.
perf shows getnstimeofday cost is negible compared to sha_transform;
normal tcp initial sequence number generation uses getnstimeofday, too.

Reported-by: Jakob Lell <***@jakoblell.com>
Signed-off-by: Florian Westphal <***@strlen.de>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
include/net/tcp.h | 18 ++++++++++++++++++
net/ipv4/syncookies.c | 31 ++++++++++---------------------
net/ipv6/syncookies.c | 24 +++++++-----------------
3 files changed, 35 insertions(+), 38 deletions(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index fa3d50c4b0c7..51dcc6faa561 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -482,6 +482,24 @@ extern int __cookie_v4_check(const struct iphdr *iph, const struct tcphdr *th,
extern struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
struct ip_options *opt);
#ifdef CONFIG_SYN_COOKIES
+#include <linux/ktime.h>
+
+/* Syncookies use a monotonic timer which increments every 64 seconds.
+ * This counter is used both as a hash input and partially encoded into
+ * the cookie value. A cookie is only validated further if the delta
+ * between the current counter value and the encoded one is less than this,
+ * i.e. a sent cookie is valid only at most for 128 seconds (or less if
+ * the counter advances immediately after a cookie is generated).
+ */
+#define MAX_SYNCOOKIE_AGE 2
+
+static inline u32 tcp_cookie_time(void)
+{
+ struct timespec now;
+ getnstimeofday(&now);
+ return now.tv_sec >> 6; /* 64 seconds granularity */
+}
+
extern u32 __cookie_v4_init_sequence(const struct iphdr *iph,
const struct tcphdr *th, u16 *mssp);
extern __u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb,
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index 14a15c49129d..b6ea2979a2b7 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -89,8 +89,7 @@ __u32 cookie_init_timestamp(struct request_sock *req)


static __u32 secure_tcp_syn_cookie(__be32 saddr, __be32 daddr, __be16 sport,
- __be16 dport, __u32 sseq, __u32 count,
- __u32 data)
+ __be16 dport, __u32 sseq, __u32 data)
{
/*
* Compute the secure sequence number.
@@ -102,7 +101,7 @@ static __u32 secure_tcp_syn_cookie(__be32 saddr, __be32 daddr, __be16 sport,
* As an extra hack, we add a small "data" value that encodes the
* MSS into the second hash value.
*/
-
+ u32 count = tcp_cookie_time();
return (cookie_hash(saddr, daddr, sport, dport, 0, 0) +
sseq + (count << COOKIEBITS) +
((cookie_hash(saddr, daddr, sport, dport, count, 1) + data)
@@ -114,22 +113,21 @@ static __u32 secure_tcp_syn_cookie(__be32 saddr, __be32 daddr, __be16 sport,
* If the syncookie is bad, the data returned will be out of
* range. This must be checked by the caller.
*
- * The count value used to generate the cookie must be within
- * "maxdiff" if the current (passed-in) "count". The return value
- * is (__u32)-1 if this test fails.
+ * The count value used to generate the cookie must be less than
+ * MAX_SYNCOOKIE_AGE minutes in the past.
+ * The return value (__u32)-1 if this test fails.
*/
static __u32 check_tcp_syn_cookie(__u32 cookie, __be32 saddr, __be32 daddr,
- __be16 sport, __be16 dport, __u32 sseq,
- __u32 count, __u32 maxdiff)
+ __be16 sport, __be16 dport, __u32 sseq)
{
- __u32 diff;
+ u32 diff, count = tcp_cookie_time();

/* Strip away the layers from the cookie */
cookie -= cookie_hash(saddr, daddr, sport, dport, 0, 0) + sseq;

/* Cookie is now reduced to (count * 2^24) ^ (hash % 2^24) */
diff = (count - (cookie >> COOKIEBITS)) & ((__u32) - 1 >> COOKIEBITS);
- if (diff >= maxdiff)
+ if (diff >= MAX_SYNCOOKIE_AGE)
return (__u32)-1;

return (cookie -
@@ -173,7 +171,7 @@ u32 __cookie_v4_init_sequence(const struct iphdr *iph, const struct tcphdr *th,

return secure_tcp_syn_cookie(iph->saddr, iph->daddr,
th->source, th->dest, ntohl(th->seq),
- jiffies / (HZ * 60), mssind);
+ mssind);
}
EXPORT_SYMBOL_GPL(__cookie_v4_init_sequence);

@@ -189,13 +187,6 @@ __u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
}

/*
- * This (misnamed) value is the age of syncookie which is permitted.
- * Its ideal value should be dependent on TCP_TIMEOUT_INIT and
- * sysctl_tcp_retries1. It's a rather complicated formula (exponential
- * backoff) to compute at runtime so it's currently hardcoded here.
- */
-#define COUNTER_TRIES 4
-/*
* Check if a ack sequence number is a valid syncookie.
* Return the decoded mss if it is, or 0 if not.
*/
@@ -204,9 +195,7 @@ int __cookie_v4_check(const struct iphdr *iph, const struct tcphdr *th,
{
__u32 seq = ntohl(th->seq) - 1;
__u32 mssind = check_tcp_syn_cookie(cookie, iph->saddr, iph->daddr,
- th->source, th->dest, seq,
- jiffies / (HZ * 60),
- COUNTER_TRIES);
+ th->source, th->dest, seq);

return mssind < ARRAY_SIZE(msstab) ? msstab[mssind] : 0;
}
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index bf63ac8a49b9..13ca0a0ea680 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -36,14 +36,6 @@ static __u16 const msstab[] = {
9000 - 60,
};

-/*
- * This (misnamed) value is the age of syncookie which is permitted.
- * Its ideal value should be dependent on TCP_TIMEOUT_INIT and
- * sysctl_tcp_retries1. It's a rather complicated formula (exponential
- * backoff) to compute at runtime so it's currently hardcoded here.
- */
-#define COUNTER_TRIES 4
-
static inline struct sock *get_cookie_sock(struct sock *sk, struct sk_buff *skb,
struct request_sock *req,
struct dst_entry *dst)
@@ -86,8 +78,9 @@ static u32 cookie_hash(const struct in6_addr *saddr, const struct in6_addr *dadd
static __u32 secure_tcp_syn_cookie(const struct in6_addr *saddr,
const struct in6_addr *daddr,
__be16 sport, __be16 dport, __u32 sseq,
- __u32 count, __u32 data)
+ __u32 data)
{
+ u32 count = tcp_cookie_time();
return (cookie_hash(saddr, daddr, sport, dport, 0, 0) +
sseq + (count << COOKIEBITS) +
((cookie_hash(saddr, daddr, sport, dport, count, 1) + data)
@@ -96,15 +89,14 @@ static __u32 secure_tcp_syn_cookie(const struct in6_addr *saddr,

static __u32 check_tcp_syn_cookie(__u32 cookie, const struct in6_addr *saddr,
const struct in6_addr *daddr, __be16 sport,
- __be16 dport, __u32 sseq, __u32 count,
- __u32 maxdiff)
+ __be16 dport, __u32 sseq)
{
- __u32 diff;
+ __u32 diff, count = tcp_cookie_time();

cookie -= cookie_hash(saddr, daddr, sport, dport, 0, 0) + sseq;

diff = (count - (cookie >> COOKIEBITS)) & ((__u32) -1 >> COOKIEBITS);
- if (diff >= maxdiff)
+ if (diff >= MAX_SYNCOOKIE_AGE)
return (__u32)-1;

return (cookie -
@@ -125,8 +117,7 @@ u32 __cookie_v6_init_sequence(const struct ipv6hdr *iph,
*mssp = msstab[mssind];

return secure_tcp_syn_cookie(&iph->saddr, &iph->daddr, th->source,
- th->dest, ntohl(th->seq),
- jiffies / (HZ * 60), mssind);
+ th->dest, ntohl(th->seq), mssind);
}
EXPORT_SYMBOL_GPL(__cookie_v6_init_sequence);

@@ -146,8 +137,7 @@ int __cookie_v6_check(const struct ipv6hdr *iph, const struct tcphdr *th,
{
__u32 seq = ntohl(th->seq) - 1;
__u32 mssind = check_tcp_syn_cookie(cookie, &iph->saddr, &iph->daddr,
- th->source, th->dest, seq,
- jiffies / (HZ * 60), COUNTER_TRIES);
+ th->source, th->dest, seq);

return mssind < ARRAY_SIZE(msstab) ? msstab[mssind] : 0;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:47:04 UTC
Permalink
From: Max Stepanov <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit e7eb65cac0720df8b3946af7f7a9dc363cf0a814 upstream.

Some APs reject STA association request if a listen interval value exceeds
a threshold of 10. Thus, for example, Cisco APs may deny STA associations
returning status code 12 (Association denied due to reason outside the scope
of 802.11 standard) in the association response frame.

Fixing the issue by setting the default IWL_CONN_MAX_LISTEN_INTERVAL value
from 70 to 10.

Signed-off-by: Max Stepanov <***@intel.com>
Reviewed-by: Alexander Bondar <***@intel.com>
Signed-off-by: Emmanuel Grumbach <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/iwlwifi/mvm/mvm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index b0389279cc1e..c86663ebb493 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -152,7 +152,7 @@ enum iwl_power_scheme {
IWL_POWER_SCHEME_LP
};

-#define IWL_CONN_MAX_LISTEN_INTERVAL 70
+#define IWL_CONN_MAX_LISTEN_INTERVAL 10
#define IWL_UAPSD_AC_INFO (IEEE80211_WMM_IE_STA_QOSINFO_AC_VO |\
IEEE80211_WMM_IE_STA_QOSINFO_AC_VI |\
IEEE80211_WMM_IE_STA_QOSINFO_AC_BK |\
--
1.9.0
Jiri Slaby
2014-03-22 10:46:59 UTC
Permalink
From: Johannes Berg <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 864a6040f395464003af8dd0d8ca86fed19866d4 upstream.

Avoid leaking data by sending uninitialized memory and setting an
invalid (non-zero) fragment number (the sequence number is ignored
anyway) by setting the seq_ctrl field to zero.

Fixes: 3f52b7e328c5 ("mac80211: mesh power save basics")
Fixes: ce662b44ce22 ("mac80211: send (QoS) Null if no buffered frames")
Reviewed-by: Emmanuel Grumbach <***@intel.com>
Signed-off-by: Johannes Berg <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/mac80211/mesh_ps.c | 1 +
net/mac80211/sta_info.c | 1 +
2 files changed, 2 insertions(+)

diff --git a/net/mac80211/mesh_ps.c b/net/mac80211/mesh_ps.c
index 22290a929b94..641f43219a48 100644
--- a/net/mac80211/mesh_ps.c
+++ b/net/mac80211/mesh_ps.c
@@ -36,6 +36,7 @@ static struct sk_buff *mps_qos_null_get(struct sta_info *sta)
sdata->vif.addr);
nullfunc->frame_control = fc;
nullfunc->duration_id = 0;
+ nullfunc->seq_ctrl = 0;
/* no address resolution for this frame -> set addr 1 immediately */
memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
memset(skb_put(skb, 2), 0, 2); /* append QoS control field */
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 662a620d73f2..db41c190e76d 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -1118,6 +1118,7 @@ static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
+ nullfunc->seq_ctrl = 0;

skb->priority = tid;
skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
--
1.9.0
Jiri Slaby
2014-03-22 10:46:42 UTC
Permalink
From: Michal Kubecek <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 12e3594698f6c3ab6ebacc79f2fb2ad2bb5952b5 upstream.

In ipcomp_compress(), sortirq is enabled too early, allowing the
per-cpu scratch buffer to be rewritten by ipcomp_decompress()
(called on the same CPU in softirq context) between populating
the buffer and copying the compressed data to the skb.

v2: as pointed out by Steffen Klassert, if we also move the
local_bh_disable() before reading the per-cpu pointers, we can
get rid of get_cpu()/put_cpu().

v3: removed ipcomp_decompress part (as explained by Herbert Xu,
it cannot be called from process context), get rid of cpu
variable (thanks to Eric Dumazet)

Signed-off-by: Michal Kubecek <***@suse.cz>
Reviewed-by: Eric Dumazet <***@google.com>
Acked-by: Herbert Xu <***@gondor.apana.org.au>
Signed-off-by: Steffen Klassert <***@secunet.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/xfrm/xfrm_ipcomp.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/net/xfrm/xfrm_ipcomp.c b/net/xfrm/xfrm_ipcomp.c
index 2906d520eea7..3be02b680268 100644
--- a/net/xfrm/xfrm_ipcomp.c
+++ b/net/xfrm/xfrm_ipcomp.c
@@ -141,14 +141,14 @@ static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb)
const int plen = skb->len;
int dlen = IPCOMP_SCRATCH_SIZE;
u8 *start = skb->data;
- const int cpu = get_cpu();
- u8 *scratch = *per_cpu_ptr(ipcomp_scratches, cpu);
- struct crypto_comp *tfm = *per_cpu_ptr(ipcd->tfms, cpu);
+ struct crypto_comp *tfm;
+ u8 *scratch;
int err;

local_bh_disable();
+ scratch = *this_cpu_ptr(ipcomp_scratches);
+ tfm = *this_cpu_ptr(ipcd->tfms);
err = crypto_comp_compress(tfm, start, plen, scratch, &dlen);
- local_bh_enable();
if (err)
goto out;

@@ -158,13 +158,13 @@ static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb)
}

memcpy(start + sizeof(struct ip_comp_hdr), scratch, dlen);
- put_cpu();
+ local_bh_enable();

pskb_trim(skb, dlen + sizeof(struct ip_comp_hdr));
return 0;

out:
- put_cpu();
+ local_bh_enable();
return err;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:28 UTC
Permalink
From: Waiman Long <***@hp.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit fee7114298cf54bbd221cdb2ab49738be8b94f4c upstream.

While running the high_systime workload of the AIM7 benchmark on
a 2-socket 12-core Westmere x86-64 machine running 3.10-rc4 kernel
(with HT on), it was found that a pretty sizable amount of time was
spent in the SELinux code. Below was the perf trace of the "perf
record -a -s" of a test run at 1500 users:

5.04% ls [kernel.kallsyms] [k] ebitmap_get_bit
1.96% ls [kernel.kallsyms] [k] mls_level_isvalid
1.95% ls [kernel.kallsyms] [k] find_next_bit

The ebitmap_get_bit() was the hottest function in the perf-report
output. Both the ebitmap_get_bit() and find_next_bit() functions
were, in fact, called by mls_level_isvalid(). As a result, the
mls_level_isvalid() call consumed 8.95% of the total CPU time of
all the 24 virtual CPUs which is quite a lot. The majority of the
mls_level_isvalid() function invocations come from the socket creation
system call.

Looking at the mls_level_isvalid() function, it is checking to see
if all the bits set in one of the ebitmap structure are also set in
another one as well as the highest set bit is no bigger than the one
specified by the given policydb data structure. It is doing it in
a bit-by-bit manner. So if the ebitmap structure has many bits set,
the iteration loop will be done many times.

The current code can be rewritten to use a similar algorithm as the
ebitmap_contains() function with an additional check for the
highest set bit. The ebitmap_contains() function was extended to
cover an optional additional check for the highest set bit, and the
mls_level_isvalid() function was modified to call ebitmap_contains().

With that change, the perf trace showed that the used CPU time drop
down to just 0.08% (ebitmap_contains + mls_level_isvalid) of the
total which is about 100X less than before.

0.07% ls [kernel.kallsyms] [k] ebitmap_contains
0.05% ls [kernel.kallsyms] [k] ebitmap_get_bit
0.01% ls [kernel.kallsyms] [k] mls_level_isvalid
0.01% ls [kernel.kallsyms] [k] find_next_bit

The remaining ebitmap_get_bit() and find_next_bit() functions calls
are made by other kernel routines as the new mls_level_isvalid()
function will not call them anymore.

This patch also improves the high_systime AIM7 benchmark result,
though the improvement is not as impressive as is suggested by the
reduction in CPU time spent in the ebitmap functions. The table below
shows the performance change on the 2-socket x86-64 system (with HT
on) mentioned above.

+--------------+---------------+----------------+-----------------+
| Workload | mean % change | mean % change | mean % change |
| | 10-100 users | 200-1000 users | 1100-2000 users |
+--------------+---------------+----------------+-----------------+
| high_systime | +0.1% | +0.9% | +2.6% |
+--------------+---------------+----------------+-----------------+

Signed-off-by: Waiman Long <***@hp.com>
Acked-by: Stephen Smalley <***@tycho.nsa.gov>
Signed-off-by: Paul Moore <***@redhat.com>
Signed-off-by: Eric Paris <***@redhat.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
security/selinux/ss/ebitmap.c | 20 ++++++++++++++++++--
security/selinux/ss/ebitmap.h | 2 +-
security/selinux/ss/mls.c | 22 +++++++---------------
security/selinux/ss/mls_types.h | 2 +-
4 files changed, 27 insertions(+), 19 deletions(-)

diff --git a/security/selinux/ss/ebitmap.c b/security/selinux/ss/ebitmap.c
index 30f119b1d1ec..820313a04d49 100644
--- a/security/selinux/ss/ebitmap.c
+++ b/security/selinux/ss/ebitmap.c
@@ -213,7 +213,12 @@ netlbl_import_failure:
}
#endif /* CONFIG_NETLABEL */

-int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2)
+/*
+ * Check to see if all the bits set in e2 are also set in e1. Optionally,
+ * if last_e2bit is non-zero, the highest set bit in e2 cannot exceed
+ * last_e2bit.
+ */
+int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2, u32 last_e2bit)
{
struct ebitmap_node *n1, *n2;
int i;
@@ -223,14 +228,25 @@ int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2)

n1 = e1->node;
n2 = e2->node;
+
while (n1 && n2 && (n1->startbit <= n2->startbit)) {
if (n1->startbit < n2->startbit) {
n1 = n1->next;
continue;
}
- for (i = 0; i < EBITMAP_UNIT_NUMS; i++) {
+ for (i = EBITMAP_UNIT_NUMS - 1; (i >= 0) && !n2->maps[i]; )
+ i--; /* Skip trailing NULL map entries */
+ if (last_e2bit && (i >= 0)) {
+ u32 lastsetbit = n2->startbit + i * EBITMAP_UNIT_SIZE +
+ __fls(n2->maps[i]);
+ if (lastsetbit > last_e2bit)
+ return 0;
+ }
+
+ while (i >= 0) {
if ((n1->maps[i] & n2->maps[i]) != n2->maps[i])
return 0;
+ i--;
}

n1 = n1->next;
diff --git a/security/selinux/ss/ebitmap.h b/security/selinux/ss/ebitmap.h
index 922f8afa89dd..e7eb3a9c5ab7 100644
--- a/security/selinux/ss/ebitmap.h
+++ b/security/selinux/ss/ebitmap.h
@@ -117,7 +117,7 @@ static inline void ebitmap_node_clr_bit(struct ebitmap_node *n,

int ebitmap_cmp(struct ebitmap *e1, struct ebitmap *e2);
int ebitmap_cpy(struct ebitmap *dst, struct ebitmap *src);
-int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2);
+int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2, u32 last_e2bit);
int ebitmap_get_bit(struct ebitmap *e, unsigned long bit);
int ebitmap_set_bit(struct ebitmap *e, unsigned long bit, int value);
void ebitmap_destroy(struct ebitmap *e);
diff --git a/security/selinux/ss/mls.c b/security/selinux/ss/mls.c
index 40de8d3f208e..c85bc1ec040c 100644
--- a/security/selinux/ss/mls.c
+++ b/security/selinux/ss/mls.c
@@ -160,8 +160,6 @@ void mls_sid_to_context(struct context *context,
int mls_level_isvalid(struct policydb *p, struct mls_level *l)
{
struct level_datum *levdatum;
- struct ebitmap_node *node;
- int i;

if (!l->sens || l->sens > p->p_levels.nprim)
return 0;
@@ -170,19 +168,13 @@ int mls_level_isvalid(struct policydb *p, struct mls_level *l)
if (!levdatum)
return 0;

- ebitmap_for_each_positive_bit(&l->cat, node, i) {
- if (i > p->p_cats.nprim)
- return 0;
- if (!ebitmap_get_bit(&levdatum->level->cat, i)) {
- /*
- * Category may not be associated with
- * sensitivity.
- */
- return 0;
- }
- }
-
- return 1;
+ /*
+ * Return 1 iff all the bits set in l->cat are also be set in
+ * levdatum->level->cat and no bit in l->cat is larger than
+ * p->p_cats.nprim.
+ */
+ return ebitmap_contains(&levdatum->level->cat, &l->cat,
+ p->p_cats.nprim);
}

int mls_range_isvalid(struct policydb *p, struct mls_range *r)
diff --git a/security/selinux/ss/mls_types.h b/security/selinux/ss/mls_types.h
index 03bed52a8052..e93648774137 100644
--- a/security/selinux/ss/mls_types.h
+++ b/security/selinux/ss/mls_types.h
@@ -35,7 +35,7 @@ static inline int mls_level_eq(struct mls_level *l1, struct mls_level *l2)
static inline int mls_level_dom(struct mls_level *l1, struct mls_level *l2)
{
return ((l1->sens >= l2->sens) &&
- ebitmap_contains(&l1->cat, &l2->cat));
+ ebitmap_contains(&l1->cat, &l2->cat, 0));
}

#define mls_level_incomp(l1, l2) \
--
1.9.0
Jiri Slaby
2014-03-22 10:47:07 UTC
Permalink
From: Emmanuel Grumbach <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 205e2210daa975d92ace485a65a31ccc4077fe1a upstream.

NICs supported by iwldvm don't handle well TX AMPDU.
Disable it by default, still leave the possibility to
the user to force enable it with a debug parameter.

NICs supported by iwlmvm don't suffer from the same issue,
leave TX AMPDU enabled by default for these.

Signed-off-by: Emmanuel Grumbach <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/iwlwifi/dvm/mac80211.c | 22 ++++++++++++++++++++--
drivers/net/wireless/iwlwifi/iwl-drv.c | 2 +-
drivers/net/wireless/iwlwifi/iwl-modparams.h | 11 +++++++----
drivers/net/wireless/iwlwifi/mvm/mac80211.c | 22 ++++++++++++++++++++--
4 files changed, 48 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/dvm/mac80211.c b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
index cae4d3182e33..d6e6405a9b07 100644
--- a/drivers/net/wireless/iwlwifi/dvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
@@ -704,6 +704,24 @@ static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
return ret;
}

+static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
+{
+ if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
+ return false;
+ return true;
+}
+
+static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
+{
+ if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
+ return false;
+ if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
+ return true;
+
+ /* disabled by default */
+ return false;
+}
+
static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum ieee80211_ampdu_mlme_action action,
@@ -725,7 +743,7 @@ static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,

switch (action) {
case IEEE80211_AMPDU_RX_START:
- if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
+ if (!iwl_enable_rx_ampdu(priv->cfg))
break;
IWL_DEBUG_HT(priv, "start Rx\n");
ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
@@ -737,7 +755,7 @@ static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
case IEEE80211_AMPDU_TX_START:
if (!priv->trans->ops->txq_enable)
break;
- if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
+ if (!iwl_enable_tx_ampdu(priv->cfg))
break;
IWL_DEBUG_HT(priv, "start Tx\n");
ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
diff --git a/drivers/net/wireless/iwlwifi/iwl-drv.c b/drivers/net/wireless/iwlwifi/iwl-drv.c
index 99e1da3123c9..2cdbd940575e 100644
--- a/drivers/net/wireless/iwlwifi/iwl-drv.c
+++ b/drivers/net/wireless/iwlwifi/iwl-drv.c
@@ -1210,7 +1210,7 @@ module_param_named(swcrypto, iwlwifi_mod_params.sw_crypto, int, S_IRUGO);
MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
module_param_named(11n_disable, iwlwifi_mod_params.disable_11n, uint, S_IRUGO);
MODULE_PARM_DESC(11n_disable,
- "disable 11n functionality, bitmap: 1: full, 2: agg TX, 4: agg RX");
+ "disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX");
module_param_named(amsdu_size_8K, iwlwifi_mod_params.amsdu_size_8K,
int, S_IRUGO);
MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0)");
diff --git a/drivers/net/wireless/iwlwifi/iwl-modparams.h b/drivers/net/wireless/iwlwifi/iwl-modparams.h
index a1f580c0c6c6..4c6cff4218cb 100644
--- a/drivers/net/wireless/iwlwifi/iwl-modparams.h
+++ b/drivers/net/wireless/iwlwifi/iwl-modparams.h
@@ -79,9 +79,12 @@ enum iwl_power_level {
IWL_POWER_NUM
};

-#define IWL_DISABLE_HT_ALL BIT(0)
-#define IWL_DISABLE_HT_TXAGG BIT(1)
-#define IWL_DISABLE_HT_RXAGG BIT(2)
+enum iwl_disable_11n {
+ IWL_DISABLE_HT_ALL = BIT(0),
+ IWL_DISABLE_HT_TXAGG = BIT(1),
+ IWL_DISABLE_HT_RXAGG = BIT(2),
+ IWL_ENABLE_HT_TXAGG = BIT(3),
+};

/**
* struct iwl_mod_params
@@ -90,7 +93,7 @@ enum iwl_power_level {
*
* @sw_crypto: using hardware encryption, default = 0
* @disable_11n: disable 11n capabilities, default = 0,
- * use IWL_DISABLE_HT_* constants
+ * use IWL_[DIS,EN]ABLE_HT_* constants
* @amsdu_size_8K: enable 8K amsdu size, default = 0
* @restart_fw: restart firmware, default = 1
* @wd_disable: enable stuck queue check, default = 0
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 9833cdf6177c..5f6fd44e72f1 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -297,6 +297,24 @@ static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
ieee80211_free_txskb(hw, skb);
}

+static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
+{
+ if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
+ return false;
+ return true;
+}
+
+static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
+{
+ if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
+ return false;
+ if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
+ return true;
+
+ /* enabled by default */
+ return true;
+}
+
static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum ieee80211_ampdu_mlme_action action,
@@ -316,7 +334,7 @@ static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,

switch (action) {
case IEEE80211_AMPDU_RX_START:
- if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) {
+ if (!iwl_enable_rx_ampdu(mvm->cfg)) {
ret = -EINVAL;
break;
}
@@ -326,7 +344,7 @@ static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
break;
case IEEE80211_AMPDU_TX_START:
- if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) {
+ if (!iwl_enable_tx_ampdu(mvm->cfg)) {
ret = -EINVAL;
break;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:46 UTC
Permalink
=46rom: Rob Clark <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit 9ef7506f7eff3fc42724269f62e30164c141661f upstream.

A few of the simpler TTM drivers (cirrus, ast, mgag200) do not implemen=
t
this function. Yet can end up somehow with an evicted bo:

BUG: unable to handle kernel NULL pointer dereference at (n=
ull)
IP: [< (null)>] (null)
PGD 16e761067 PUD 16e6cf067 PMD 0
Oops: 0010 [#1] SMP
Modules linked in: bnep bluetooth rfkill fuse ip6t_rpfilter ip6t_REJE=
CT ipt_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc eb=
table_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_=
nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter=
ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf=
_nat nf_conntrack iptable_mangle iptable_security iptable_raw iptable_f=
ilter ip_tables sg btrfs zlib_deflate raid6_pq xor dm_queue_length iTCO=
_wdt iTCO_vendor_support coretemp kvm dcdbas dm_service_time microcode =
serio_raw pcspkr lpc_ich mfd_core i7core_edac edac_core ses enclosure i=
pmi_si ipmi_msghandler shpchp acpi_power_meter mperf nfsd auth_rpcgss n=
fs_acl lockd uinput sunrpc dm_multipath xfs libcrc32c ata_generic pata_=
acpi sr_mod cdrom
sd_mod usb_storage mgag200 syscopyarea sysfillrect sysimgblt i2c_alg=
o_bit lpfc drm_kms_helper ttm crc32c_intel ata_piix bfa drm ixgbe libat=
a i2c_core mdio crc_t10dif ptp crct10dif_common pps_core scsi_transport=
_fc dca scsi_tgt megaraid_sas bnx2 dm_mirror dm_region_hash dm_log dm_m=
od
CPU: 16 PID: 2572 Comm: X Not tainted 3.10.0-86.el7.x86_64 #1
Hardware name: Dell Inc. PowerEdge R810/0H235N, BIOS 0.3.0 11/14/2009
task: ffff8801799dabc0 ti: ffff88016c884000 task.ti: ffff88016c884000
RIP: 0010:[<0000000000000000>] [< (null)>] (null)
RSP: 0018:ffff88016c885ad8 EFLAGS: 00010202
RAX: ffffffffa04e94c0 RBX: ffff880178937a20 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000240004 RDI: ffff880178937a00
RBP: ffff88016c885b60 R08: 00000000000171a0 R09: ffff88007cf171a0
R10: ffffea0005842540 R11: ffffffff810487b9 R12: ffff880178937b30
R13: ffff880178937a00 R14: ffff88016c885b78 R15: ffff880179929400
FS: 00007f81ba2ef980(0000) GS:ffff88007cf00000(0000) knlGS:000000000=
0000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000016e763000 CR4: 00000000000007e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
ffffffffa0306fae ffff8801799295c0 0000000000260004 0000000000000001
ffff88016c885b60 ffffffffa0307669 00ff88007cf17738 ffff88017cf17700
ffff880178937a00 ffff880100000000 ffff880100000000 0000000079929400
Call Trace:
[<ffffffffa0306fae>] ? ttm_bo_handle_move_mem+0x54e/0x5b0 [ttm]
[<ffffffffa0307669>] ? ttm_bo_mem_space+0x169/0x340 [ttm]
[<ffffffffa0307bd7>] ttm_bo_move_buffer+0x117/0x130 [ttm]
[<ffffffff81130001>] ? perf_event_init_context+0x141/0x220
[<ffffffffa0307cb1>] ttm_bo_validate+0xc1/0x130 [ttm]
[<ffffffffa04e7377>] mgag200_bo_pin+0x87/0xc0 [mgag200]
[<ffffffffa04e56c4>] mga_crtc_cursor_set+0x474/0xbb0 [mgag200]
[<ffffffff811971d2>] ? __mem_cgroup_commit_charge+0x152/0x3b0
[<ffffffff815c4182>] ? mutex_lock+0x12/0x2f
[<ffffffffa0201433>] drm_mode_cursor_common+0x123/0x170 [drm]
[<ffffffffa0205231>] drm_mode_cursor_ioctl+0x41/0x50 [drm]
[<ffffffffa01f5ca2>] drm_ioctl+0x502/0x630 [drm]
[<ffffffff815cbab4>] ? __do_page_fault+0x1f4/0x510
[<ffffffff8101cb68>] ? __restore_xstate_sig+0x218/0x4f0
[<ffffffff811b4445>] do_vfs_ioctl+0x2e5/0x4d0
[<ffffffff8124488e>] ? file_has_perm+0x8e/0xa0
[<ffffffff811b46b1>] SyS_ioctl+0x81/0xa0
[<ffffffff815d05d9>] system_call_fastpath+0x16/0x1b
Code: Bad RIP value.
RIP [< (null)>] (null)
RSP <ffff88016c885ad8>
CR2: 0000000000000000

Signed-off-by: Rob Clark <***@redhat.com>
Reviewed-by: J=C3=A9r=C3=B4me Glisse <***@redhat.com>
Reviewed-by: Thomas Hellstrom <***@vmware.com>
Cc: ***@vger.kernel.org
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/gpu/drm/ttm/ttm_bo.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.=
c
index 729805322883..acd0fe0c80d2 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -351,9 +351,11 @@ static int ttm_bo_handle_move_mem(struct ttm_buffe=
r_object *bo,
=20
moved:
if (bo->evicted) {
- ret =3D bdev->driver->invalidate_caches(bdev, bo->mem.placement);
- if (ret)
- pr_err("Can not flush read caches\n");
+ if (bdev->driver->invalidate_caches) {
+ ret =3D bdev->driver->invalidate_caches(bdev, bo->mem.placement);
+ if (ret)
+ pr_err("Can not flush read caches\n");
+ }
bo->evicted =3D false;
}
=20
--=20
1.9.0
Jiri Slaby
2014-03-22 10:47:05 UTC
Permalink
From: Emmanuel Grumbach <***@intel.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ec6f678c74dbdb06a6a775bbb00f1d26c17c404b upstream.

We set IWL_STA_UCODE_INPROGRESS flag when we add a station
and clear it when we send the LQ command for it. But the LQ
command is sent only when the association succeeds.
If the association doesn't succeed, we would leave this flag
set and that wouldn't indicate the station entry as vacant.

This probably fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=1065663

Reviewed-by: Johannes Berg <***@intel.com>
Signed-off-by: Emmanuel Grumbach <***@intel.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/iwlwifi/dvm/sta.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/iwlwifi/dvm/sta.c b/drivers/net/wireless/iwlwifi/dvm/sta.c
index c3c13ce96eb0..e800002d6158 100644
--- a/drivers/net/wireless/iwlwifi/dvm/sta.c
+++ b/drivers/net/wireless/iwlwifi/dvm/sta.c
@@ -590,6 +590,7 @@ void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
sizeof(priv->tid_data[sta_id][tid]));

priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
+ priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;

priv->num_stations--;
--
1.9.0
Jiri Slaby
2014-03-22 10:47:03 UTC
Permalink
=46rom: Felix Fietkau <***@openwrt.org>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit b7b146c9c9a0248cc57da71244f672ebc54bbef1 upstream.

Only set sc->rx.discard_next to rx_stats->rs_more when actually
discarding the current descriptor.

Also, fix a detection of broken descriptors:
=46irst the code checks if the current descriptor is not done.
Then it checks if the next descriptor is done.
Add a check that afterwards checks the first descriptor again, because
it might have been completed in the mean time.

This fixes a regression introduced in
commit 723e711356b5a8a95728a890e254e8b0d47b55cf
"ath9k: fix handling of broken descriptors"

Reported-by: Marco Andr=C3=A9 Dinis <***@gmail.com>
Signed-off-by: Felix Fietkau <***@openwrt.org>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/ath/ath9k/recv.c | 70 +++++++++++++++++----------=
--------
1 file changed, 35 insertions(+), 35 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wirele=
ss/ath/ath9k/recv.c
index a1ab4ff46818..c2fa0e3490c7 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -730,11 +730,18 @@ static struct ath_buf *ath_get_next_rx_buf(struct=
ath_softc *sc,
return NULL;
=20
/*
- * mark descriptor as zero-length and set the 'more'
- * flag to ensure that both buffers get discarded
+ * Re-check previous descriptor, in case it has been filled
+ * in the mean time.
*/
- rs->rs_datalen =3D 0;
- rs->rs_more =3D true;
+ ret =3D ath9k_hw_rxprocdesc(ah, ds, rs);
+ if (ret =3D=3D -EINPROGRESS) {
+ /*
+ * mark descriptor as zero-length and set the 'more'
+ * flag to ensure that both buffers get discarded
+ */
+ rs->rs_datalen =3D 0;
+ rs->rs_more =3D true;
+ }
}
=20
list_del(&bf->list);
@@ -1093,32 +1100,32 @@ static int ath9k_rx_skb_preprocess(struct ath_s=
oftc *sc,
struct ath_common *common =3D ath9k_hw_common(ah);
struct ieee80211_hdr *hdr;
bool discard_current =3D sc->rx.discard_next;
- int ret =3D 0;
=20
/*
* Discard corrupt descriptors which are marked in
* ath_get_next_rx_buf().
*/
- sc->rx.discard_next =3D rx_stats->rs_more;
if (discard_current)
- return -EINVAL;
+ goto corrupt;
+
+ sc->rx.discard_next =3D false;
=20
/*
* Discard zero-length packets.
*/
if (!rx_stats->rs_datalen) {
RX_STAT_INC(rx_len_err);
- return -EINVAL;
+ goto corrupt;
}
=20
- /*
- * rs_status follows rs_datalen so if rs_datalen is too large
- * we can take a hint that hardware corrupted it, so ignore
- * those frames.
- */
+ /*
+ * rs_status follows rs_datalen so if rs_datalen is too large
+ * we can take a hint that hardware corrupted it, so ignore
+ * those frames.
+ */
if (rx_stats->rs_datalen > (common->rx_bufsize - ah->caps.rx_status_l=
en)) {
RX_STAT_INC(rx_len_err);
- return -EINVAL;
+ goto corrupt;
}
=20
/* Only use status info from the last fragment */
@@ -1132,10 +1139,8 @@ static int ath9k_rx_skb_preprocess(struct ath_so=
ftc *sc,
* This is different from the other corrupt descriptor
* condition handled above.
*/
- if (rx_stats->rs_status & ATH9K_RXERR_CORRUPT_DESC) {
- ret =3D -EINVAL;
- goto exit;
- }
+ if (rx_stats->rs_status & ATH9K_RXERR_CORRUPT_DESC)
+ goto corrupt;
=20
hdr =3D (struct ieee80211_hdr *) (skb->data + ah->caps.rx_status_len)=
;
=20
@@ -1151,18 +1156,15 @@ static int ath9k_rx_skb_preprocess(struct ath_s=
oftc *sc,
if (ath_process_fft(sc, hdr, rx_stats, rx_status->mactime))
RX_STAT_INC(rx_spectral);
=20
- ret =3D -EINVAL;
- goto exit;
+ return -EINVAL;
}
=20
/*
* everything but the rate is checked here, the rate check is done
* separately to avoid doing two lookups for a rate for each frame.
*/
- if (!ath9k_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error)=
) {
- ret =3D -EINVAL;
- goto exit;
- }
+ if (!ath9k_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error)=
)
+ return -EINVAL;
=20
rx_stats->is_mybeacon =3D ath9k_is_mybeacon(sc, hdr);
if (rx_stats->is_mybeacon) {
@@ -1173,15 +1175,11 @@ static int ath9k_rx_skb_preprocess(struct ath_s=
oftc *sc,
/*
* This shouldn't happen, but have a safety check anyway.
*/
- if (WARN_ON(!ah->curchan)) {
- ret =3D -EINVAL;
- goto exit;
- }
+ if (WARN_ON(!ah->curchan))
+ return -EINVAL;
=20
- if (ath9k_process_rate(common, hw, rx_stats, rx_status)) {
- ret =3D-EINVAL;
- goto exit;
- }
+ if (ath9k_process_rate(common, hw, rx_stats, rx_status))
+ return -EINVAL;
=20
ath9k_process_rssi(common, hw, rx_stats, rx_status);
=20
@@ -1196,9 +1194,11 @@ static int ath9k_rx_skb_preprocess(struct ath_so=
ftc *sc,
sc->rx.num_pkts++;
#endif
=20
-exit:
- sc->rx.discard_next =3D false;
- return ret;
+ return 0;
+
+corrupt:
+ sc->rx.discard_next =3D rx_stats->rs_more;
+ return -EINVAL;
}
=20
static void ath9k_rx_skb_postprocess(struct ath_common *common,
--=20
1.9.0
Jiri Slaby
2014-03-22 10:46:44 UTC
Permalink
From: Florian Westphal <***@strlen.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 086293542b991fb88a2e41ae7b4f82ac65a20e1a upstream.

Halve mss table size to make blind cookie guessing more difficult.
This is sad since the tables were already small, but there
is little alternative except perhaps adding more precise mss information
in the tcp timestamp. Timestamps are unfortunately not ubiquitous.

Guessing all possible cookie values still has 8-in 2**32 chance.

Reported-by: Jakob Lell <***@jakoblell.com>
Signed-off-by: Florian Westphal <***@strlen.de>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/ipv4/syncookies.c | 22 +++++++++++-----------
net/ipv6/syncookies.c | 15 +++++++++------
2 files changed, 20 insertions(+), 17 deletions(-)

diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index b6ea2979a2b7..15e024105f91 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -136,22 +136,22 @@ static __u32 check_tcp_syn_cookie(__u32 cookie, __be32 saddr, __be32 daddr,
}

/*
- * MSS Values are taken from the 2009 paper
- * 'Measuring TCP Maximum Segment Size' by S. Alcock and R. Nelson:
- * - values 1440 to 1460 accounted for 80% of observed mss values
- * - values outside the 536-1460 range are rare (<0.2%).
+ * MSS Values are chosen based on the 2011 paper
+ * 'An Analysis of TCP Maximum Segement Sizes' by S. Alcock and R. Nelson.
+ * Values ..
+ * .. lower than 536 are rare (< 0.2%)
+ * .. between 537 and 1299 account for less than < 1.5% of observed values
+ * .. in the 1300-1349 range account for about 15 to 20% of observed mss values
+ * .. exceeding 1460 are very rare (< 0.04%)
*
- * Table must be sorted.
+ * 1460 is the single most frequently announced mss value (30 to 46% depending
+ * on monitor location). Table must be sorted.
*/
static __u16 const msstab[] = {
- 64,
- 512,
536,
- 1024,
- 1440,
+ 1300,
+ 1440, /* 1440, 1452: PPPoE */
1460,
- 4312,
- 8960,
};

/*
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index 13ca0a0ea680..d703218a653b 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -24,15 +24,18 @@
#define COOKIEBITS 24 /* Upper bits store count */
#define COOKIEMASK (((__u32)1 << COOKIEBITS) - 1)

-/* Table must be sorted. */
+/* RFC 2460, Section 8.3:
+ * [ipv6 tcp] MSS must be computed as the maximum packet size minus 60 [..]
+ *
+ * Due to IPV6_MIN_MTU=1280 the lowest possible MSS is 1220, which allows
+ * using higher values than ipv4 tcp syncookies.
+ * The other values are chosen based on ethernet (1500 and 9k MTU), plus
+ * one that accounts for common encap (PPPoe) overhead. Table must be sorted.
+ */
static __u16 const msstab[] = {
- 64,
- 512,
- 536,
- 1280 - 60,
+ 1280 - 60, /* IPV6_MIN_MTU - 60 */
1480 - 60,
1500 - 60,
- 4460 - 60,
9000 - 60,
};
--
1.9.0
Jiri Slaby
2014-03-22 10:47:01 UTC
Permalink
From: Stanislaw Gruszka <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 21f8aaee0c62708654988ce092838aa7df4d25d8 upstream.

We check tid->sched without a lock taken on ath_tx_aggr_sleep(). That
is race condition which can result of doing list_del(&tid->list) twice
(second time with poisoned list node) and cause crash like shown below:

[424271.637220] BUG: unable to handle kernel paging request at 00100104
[424271.637328] IP: [<f90fc072>] ath_tx_aggr_sleep+0x62/0xe0 [ath9k]
...
[424271.639953] Call Trace:
[424271.639998] [<f90f6900>] ? ath9k_get_survey+0x110/0x110 [ath9k]
[424271.640083] [<f90f6942>] ath9k_sta_notify+0x42/0x50 [ath9k]
[424271.640177] [<f809cfef>] sta_ps_start+0x8f/0x1c0 [mac80211]
[424271.640258] [<c10f730e>] ? free_compound_page+0x2e/0x40
[424271.640346] [<f809e915>] ieee80211_rx_handlers+0x9d5/0x2340 [mac80211]
[424271.640437] [<c112f048>] ? kmem_cache_free+0x1d8/0x1f0
[424271.640510] [<c1345a84>] ? kfree_skbmem+0x34/0x90
[424271.640578] [<c10fc23c>] ? put_page+0x2c/0x40
[424271.640640] [<c1345a84>] ? kfree_skbmem+0x34/0x90
[424271.640706] [<c1345a84>] ? kfree_skbmem+0x34/0x90
[424271.640787] [<f809dde3>] ? ieee80211_rx_handlers_result+0x73/0x1d0 [mac80211]
[424271.640897] [<f80a07a0>] ieee80211_prepare_and_rx_handle+0x520/0xad0 [mac80211]
[424271.641009] [<f809e22d>] ? ieee80211_rx_handlers+0x2ed/0x2340 [mac80211]
[424271.641104] [<c13846ce>] ? ip_output+0x7e/0xd0
[424271.641182] [<f80a1057>] ieee80211_rx+0x307/0x7c0 [mac80211]
[424271.641266] [<f90fa6ee>] ath_rx_tasklet+0x88e/0xf70 [ath9k]
[424271.641358] [<f80a0f2c>] ? ieee80211_rx+0x1dc/0x7c0 [mac80211]
[424271.641445] [<f90f82db>] ath9k_tasklet+0xcb/0x130 [ath9k]

Bug report:
https://bugzilla.kernel.org/show_bug.cgi?id=70551

Reported-and-tested-by: Max Sydorenko <***@gmail.com>
Signed-off-by: Stanislaw Gruszka <***@redhat.com>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/ath/ath9k/xmit.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 7fe6b5923a9c..32891564ed67 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1457,14 +1457,16 @@ void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc,
for (tidno = 0, tid = &an->tid[tidno];
tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {

- if (!tid->sched)
- continue;
-
ac = tid->ac;
txq = ac->txq;

ath_txq_lock(sc, txq);

+ if (!tid->sched) {
+ ath_txq_unlock(sc, txq);
+ continue;
+ }
+
buffered = ath_tid_has_buffered(tid);

tid->sched = false;
--
1.9.0
Jiri Slaby
2014-03-22 10:47:18 UTC
Permalink
From: Takashi Iwai <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit c5eda4c1bf6214332c46fb2f4e7c42a85e5e5643 upstream.

The mixer widget (NID 0x20) of AD1884 and AD1984 codecs isn't
connected directly to the actual I/O paths but only via another mixer
widget (NID 0x21). We need a similar fix as we did for AD1882.

Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_analog.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_analog.c b/sound/pci/hda/patch_analog.c
index 7fc15814c618..41ebdd8812b1 100644
--- a/sound/pci/hda/patch_analog.c
+++ b/sound/pci/hda/patch_analog.c
@@ -1085,6 +1085,7 @@ static int patch_ad1884(struct hda_codec *codec)
spec = codec->spec;

spec->gen.mixer_nid = 0x20;
+ spec->gen.mixer_merge_nid = 0x21;
spec->gen.beep_nid = 0x10;
set_beep_amp(spec, 0x10, 0, HDA_OUTPUT);
--
1.9.0
Jiri Slaby
2014-03-22 10:47:15 UTC
Permalink
From: Roman Volkov <***@mail.ru>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 3dd77654fb1d7f68b9739f3039bad8dbbc0739f8 upstream.

Actually CS4245 connected to the I2S channel 1 for
capture, not channel 2. Otherwise capturing and
playback does not work for CS4245.

Signed-off-by: Roman Volkov <***@mail.ru>
Signed-off-by: Clemens Ladisch <***@ladisch.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/oxygen/xonar_dg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/oxygen/xonar_dg.c b/sound/pci/oxygen/xonar_dg.c
index 77acd790ea47..5519b8f0dad0 100644
--- a/sound/pci/oxygen/xonar_dg.c
+++ b/sound/pci/oxygen/xonar_dg.c
@@ -596,7 +596,7 @@ struct oxygen_model model_xonar_dg = {
.model_data_size = sizeof(struct dg),
.device_config = PLAYBACK_0_TO_I2S |
PLAYBACK_1_TO_SPDIF |
- CAPTURE_0_FROM_I2S_2 |
+ CAPTURE_0_FROM_I2S_1 |
CAPTURE_1_FROM_SPDIF,
.dac_channels_pcm = 6,
.dac_channels_mixer = 0,
--
1.9.0
Jiri Slaby
2014-03-22 10:47:11 UTC
Permalink
From: Bing Zhao <***@marvell.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit adb07df1e039e9fe43e66aeea8b4771f83659dbb upstream.

As many Surface Pro I & II users have found out, the mwifiex_usb
doesn't support usb autosuspend, and it has caused some system
stability issues.

Bug 69661 - mwifiex_usb on MS Surface Pro 1 is unstable
Bug 60815 - Interface hangs in mwifiex_usb
Bug 64111 - mwifiex_usb USB8797 crash failed to get signal
information

USB autosuspend get triggered when Surface Pro's AC power is
removed or powertop enables power saving on USB8797 device.
Driver's suspend handler is called here, but resume handler
won't be called until the AC power is put back on or powertop
disables power saving for USB8797.

We need to refactor the suspend/resume handlers to support
usb autosuspend properly. For now let's just remove it.

Signed-off-by: Bing Zhao <***@marvell.com>
Signed-off-by: Amitkumar Karwar <***@marvell.com>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/mwifiex/usb.c | 8 --------
1 file changed, 8 deletions(-)

diff --git a/drivers/net/wireless/mwifiex/usb.c b/drivers/net/wireless/mwifiex/usb.c
index 1c70b8d09227..9d0b0c442c95 100644
--- a/drivers/net/wireless/mwifiex/usb.c
+++ b/drivers/net/wireless/mwifiex/usb.c
@@ -512,13 +512,6 @@ static int mwifiex_usb_resume(struct usb_interface *intf)
MWIFIEX_BSS_ROLE_ANY),
MWIFIEX_ASYNC_CMD);

-#ifdef CONFIG_PM
- /* Resume handler may be called due to remote wakeup,
- * force to exit suspend anyway
- */
- usb_disable_autosuspend(card->udev);
-#endif /* CONFIG_PM */
-
return 0;
}

@@ -555,7 +548,6 @@ static struct usb_driver mwifiex_usb_driver = {
.id_table = mwifiex_usb_table,
.suspend = mwifiex_usb_suspend,
.resume = mwifiex_usb_resume,
- .supports_autosuspend = 1,
};

static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
--
1.9.0
Jiri Slaby
2014-03-22 10:47:17 UTC
Permalink
From: Marius Knaust <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit a6b92b6650d010d58b6e6fe42c6271266e0b1134 upstream.

Signed-off-by: Marius Knaust <***@gmail.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_realtek.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 1be437f533a6..d19606b68b96 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -4000,6 +4000,7 @@ static const struct hda_fixup alc269_fixups[] = {
};

static const struct snd_pci_quirk alc269_fixup_tbl[] = {
+ SND_PCI_QUIRK(0x1025, 0x0283, "Acer TravelMate 8371", ALC269_FIXUP_INV_DMIC),
SND_PCI_QUIRK(0x1025, 0x029b, "Acer 1810TZ", ALC269_FIXUP_INV_DMIC),
SND_PCI_QUIRK(0x1025, 0x0349, "Acer AOD260", ALC269_FIXUP_INV_DMIC),
SND_PCI_QUIRK(0x1025, 0x047c, "Acer AC700", ALC269_FIXUP_ACER_AC700),
--
1.9.0
Jiri Slaby
2014-03-22 10:46:41 UTC
Permalink
From: Oleg Drokin <***@linuxhacker.ru>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit d22e6338db7f613dd4f6095c190682fcc519e4b7 upstream.

Recent changes to retry on ESTALE in linkat
(commit 442e31ca5a49e398351b2954b51f578353fdf210)
introduced a mountpoint reference leak and a small memory
leak in case a filesystem link operation returns ESTALE
which is pretty normal for distributed filesystems like
lustre, nfs and so on.
Free old_path in such a case.

[AV: there was another missing path_put() nearby - on the previous
goto retry]

[js: the second path_put is not in 3.12 yet, hunk removed]

Signed-off-by: Oleg Drokin: <***@linuxhacker.ru>
Signed-off-by: Al Viro <***@zeniv.linux.org.uk>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/namei.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/fs/namei.c b/fs/namei.c
index 23ac50f4ee40..187cacf1c83c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3924,6 +3924,7 @@ retry:
out_dput:
done_path_create(&new_path, new_dentry);
if (retry_estale(error, how)) {
+ path_put(&old_path);
how |= LOOKUP_REVAL;
goto retry;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:37 UTC
Permalink
From: Hans Schillstrom <***@schillstrom.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit accfe0e356327da5bd53da8852b93fc22de9b5fc ]

The commit 9195bb8e381d81d5a315f911904cdf0cfcc919b8 ("ipv6: improve
ipv6_find_hdr() to skip empty routing headers") broke ipv6_find_hdr().

When a target is specified like IPPROTO_ICMPV6 ipv6_find_hdr()
returns -ENOENT when it's found, not the header as expected.

A part of IPVS is broken and possible also nft_exthdr_eval().
When target is -1 which it is most cases, it works.

This patch exits the do while loop if the specific header is found
so the nexthdr could be returned as expected.

Reported-by: Art -kwaak- van Breemen <***@telegraafnet.nl>
Signed-off-by: Hans Schillstrom <***@schillstrom.com>
CC:Ansis Atteka <***@nicira.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/ipv6/exthdrs_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/exthdrs_core.c b/net/ipv6/exthdrs_core.c
index 140748debc4a..8af3eb57f438 100644
--- a/net/ipv6/exthdrs_core.c
+++ b/net/ipv6/exthdrs_core.c
@@ -212,7 +212,7 @@ int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
found = (nexthdr == target);

if ((!ipv6_ext_hdr(nexthdr)) || nexthdr == NEXTHDR_NONE) {
- if (target < 0)
+ if (target < 0 || found)
break;
return -ENOENT;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:36 UTC
Permalink
From: Edward Cree <***@solarflare.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit 8f355e5cee63c2c0c145d8206c4245d0189f47ff ]

If we receive a PTP event from the NIC when we haven't set up PTP state
in the driver, we attempt to read through a NULL pointer efx->ptp_data,
triggering a panic.

Signed-off-by: Edward Cree <***@solarflare.com>
Acked-by: Shradha Shah <***@solarflare.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/ethernet/sfc/ptp.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c
index 3dd39dcfe36b..a12410381cb1 100644
--- a/drivers/net/ethernet/sfc/ptp.c
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -1360,6 +1360,13 @@ void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev)
struct efx_ptp_data *ptp = efx->ptp_data;
int code = EFX_QWORD_FIELD(*ev, MCDI_EVENT_CODE);

+ if (!ptp) {
+ if (net_ratelimit())
+ netif_warn(efx, drv, efx->net_dev,
+ "Received PTP event but PTP not set up\n");
+ return;
+ }
+
if (!ptp->enabled)
return;
--
1.9.0
Jiri Slaby
2014-03-22 10:47:08 UTC
Permalink
From: Avinash Patil <***@marvell.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 4f7ba432202c8330cc03ab959c6228d0de5dc4a3 upstream.

Write io memory to clean PCIe buffer only when PCIe device is
present else this results into crash because of invalid memory
access.

Signed-off-by: Avinash Patil <***@marvell.com>
Signed-off-by: Bing Zhao <***@marvell.com>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/mwifiex/wmm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c
index 95fa3599b407..35f881585962 100644
--- a/drivers/net/wireless/mwifiex/wmm.c
+++ b/drivers/net/wireless/mwifiex/wmm.c
@@ -559,7 +559,8 @@ mwifiex_clean_txrx(struct mwifiex_private *priv)
mwifiex_wmm_delete_all_ralist(priv);
memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));

- if (priv->adapter->if_ops.clean_pcie_ring)
+ if (priv->adapter->if_ops.clean_pcie_ring &&
+ !priv->adapter->surprise_removed)
priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
}
--
1.9.0
Jiri Slaby
2014-03-22 10:47:14 UTC
Permalink
=46rom: Lauri Kasanen <***@gmx.com>

3.12-stable review patch. If anyone has any objections, please let me =
know.

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

commit 14eedc32a3c0ec9dd70448a73763ee21feae3111 upstream.

Without this, a bo may get created in the cpu-inaccessible vram.
Before the CP engines get setup, all copies are done via cpu memcpy.

This means that the cpu tries to read from inaccessible memory, fails,
and the radeon module proceeds to disable acceleration.

Doing this has no downsides, as the real VRAM size gets set as soon as =
the
CP engines get init.

This is a candidate for 3.14 fixes.

v2: Add comment on why the function is used

Signed-off-by: Lauri Kasanen <***@gmx.com>
Signed-off-by: Alex Deucher <***@amd.com>
Reviewed-by: Christian K=C3=B6nig <***@amd.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/gpu/drm/radeon/radeon_ttm.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/rade=
on/radeon_ttm.c
index 71245d6f34a2..84323c943bfc 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -712,6 +712,9 @@ int radeon_ttm_init(struct radeon_device *rdev)
DRM_ERROR("Failed initializing VRAM heap.\n");
return r;
}
+ /* Change the size here instead of the init above so only lpfn is aff=
ected */
+ radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
+
r =3D radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
RADEON_GEM_DOMAIN_VRAM,
NULL, &rdev->stollen_vga_memory);
--=20
1.9.0
Jiri Slaby
2014-03-22 10:46:17 UTC
Permalink
From: Peter Zijlstra <***@infradead.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 42eb088ed246a5a817bb45a8b32fe234cf1c0f8b upstream.

Commit 37dc6b50cee9 ("sched: Remove unnecessary iteration over sched
domains to update nr_busy_cpus") forgot to clear 'sd_busy' under some
conditions leading to a possible NULL deref in set_cpu_sd_state_idle().

Reported-by: Anton Blanchard <***@samba.org>
Cc: Preeti U Murthy <***@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <***@infradead.org>
Link: http://lkml.kernel.org/r/***@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/sched/core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 6135b7c6bcfe..bc2f26d03751 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5132,8 +5132,9 @@ static void update_top_cache_domain(int cpu)
if (sd) {
id = cpumask_first(sched_domain_span(sd));
size = cpumask_weight(sched_domain_span(sd));
- rcu_assign_pointer(per_cpu(sd_busy, cpu), sd->parent);
+ sd = sd->parent; /* sd_busy */
}
+ rcu_assign_pointer(per_cpu(sd_busy, cpu), sd);

rcu_assign_pointer(per_cpu(sd_llc, cpu), sd);
per_cpu(sd_llc_size, cpu) = size;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:45 UTC
Permalink
From: Filipe Brandenburger <***@google.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 4fb1a86fb5e4209a7d4426d4e586c58e9edc74ac upstream.

Sometimes the cleanup after memcg hierarchy testing gets stuck in
mem_cgroup_reparent_charges(), unable to bring non-kmem usage down to 0.

There may turn out to be several causes, but a major cause is this: the
workitem to offline parent can get run before workitem to offline child;
parent's mem_cgroup_reparent_charges() circles around waiting for the
child's pages to be reparented to its lrus, but it's holding
cgroup_mutex which prevents the child from reaching its
mem_cgroup_reparent_charges().

Further testing showed that an ordered workqueue for cgroup_destroy_wq
is not always good enough: percpu_ref_kill_and_confirm's call_rcu_sched
stage on the way can mess up the order before reaching the workqueue.

Instead, when offlining a memcg, call mem_cgroup_reparent_charges() on
all its children (and grandchildren, in the correct order) to have their
charges reparented first.

Fixes: e5fca243abae ("cgroup: use a dedicated workqueue for cgroup destruction")
Signed-off-by: Filipe Brandenburger <***@google.com>
Signed-off-by: Hugh Dickins <***@google.com>
Reviewed-by: Tejun Heo <***@kernel.org>
Acked-by: Michal Hocko <***@suse.cz>
Cc: Johannes Weiner <***@cmpxchg.org>
Cc: <***@vger.kernel.org> [v3.10+]
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
mm/memcontrol.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 8e7adcba8176..a3be835d999f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6346,11 +6346,24 @@ static void mem_cgroup_invalidate_reclaim_iterators(struct mem_cgroup *memcg)
static void mem_cgroup_css_offline(struct cgroup_subsys_state *css)
{
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
+ struct cgroup_subsys_state *iter;

kmem_cgroup_css_offline(memcg);

mem_cgroup_invalidate_reclaim_iterators(memcg);
- mem_cgroup_reparent_charges(memcg);
+
+ /*
+ * This requires that offlining is serialized. Right now that is
+ * guaranteed because css_killed_work_fn() holds the cgroup_mutex.
+ */
+ rcu_read_lock();
+ css_for_each_descendant_post(iter, css) {
+ rcu_read_unlock();
+ mem_cgroup_reparent_charges(mem_cgroup_from_css(iter));
+ rcu_read_lock();
+ }
+ rcu_read_unlock();
+
mem_cgroup_destroy_all_caches(memcg);
vmpressure_cleanup(&memcg->vmpressure);
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:23 UTC
Permalink
3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 5f01c98859073cb512b01d4fad74b5f4e047be0b upstream.

Consider a kernel crash in a module, simulated the following way:

static int my_init(void)
{
char *map = (void *)0x5;
*map = 3;
return 0;
}
module_init(my_init);

When we turn off FRAME_POINTERs, the very first instruction in
that function causes a BUG. The problem is that we print IP in
the BUG report using %pB (from printk_address). And %pB
decrements the pointer by one to fix printing addresses of
functions with tail calls.

This was added in commit 71f9e59800e5ad4 ("x86, dumpstack: Use
%pB format specifier for stack trace") to fix the call stack
printouts.

So instead of correct output:

BUG: unable to handle kernel NULL pointer dereference at 0000000000000005
IP: [<ffffffffa01ac000>] my_init+0x0/0x10 [pb173]

We get:

BUG: unable to handle kernel NULL pointer dereference at 0000000000000005
IP: [<ffffffffa0152000>] 0xffffffffa0151fff

To fix that, we use %pS only for stack addresses printouts (via
newly added printk_stack_address) and %pB for regs->ip (via
printk_address). I.e. we revert to the old behaviour for all
except call stacks. And since from all those reliable is 1, we
remove that parameter from printk_address.

Signed-off-by: Jiri Slaby <***@suse.cz>
Cc: Namhyung Kim <***@gmail.com>
Cc: Frederic Weisbecker <***@gmail.com>
Cc: Ingo Molnar <***@elte.hu>
Cc: "H. Peter Anvin" <***@zytor.com>
Cc: ***@perches.com
Cc: ***@gmail.com
Link: http://lkml.kernel.org/r/1382706418-8435-1-git-send-email-***@suse.cz
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
arch/x86/include/asm/kdebug.h | 2 +-
arch/x86/kernel/dumpstack.c | 11 ++++++++---
arch/x86/kernel/process_64.c | 2 +-
arch/x86/mm/fault.c | 2 +-
4 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/arch/x86/include/asm/kdebug.h b/arch/x86/include/asm/kdebug.h
index 2c37aadcbc35..32ce71375b21 100644
--- a/arch/x86/include/asm/kdebug.h
+++ b/arch/x86/include/asm/kdebug.h
@@ -21,7 +21,7 @@ enum die_val {
DIE_NMIUNKNOWN,
};

-extern void printk_address(unsigned long address, int reliable);
+extern void printk_address(unsigned long address);
extern void die(const char *, struct pt_regs *,long);
extern int __must_check __die(const char *, struct pt_regs *, long);
extern void show_trace(struct task_struct *t, struct pt_regs *regs,
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index deb6421c9e69..d9c12d3022a7 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -25,12 +25,17 @@ unsigned int code_bytes = 64;
int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
static int die_counter;

-void printk_address(unsigned long address, int reliable)
+static void printk_stack_address(unsigned long address, int reliable)
{
pr_cont(" [<%p>] %s%pB\n",
(void *)address, reliable ? "" : "? ", (void *)address);
}

+void printk_address(unsigned long address)
+{
+ pr_cont(" [<%p>] %pS\n", (void *)address, (void *)address);
+}
+
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
static void
print_ftrace_graph_addr(unsigned long addr, void *data,
@@ -151,7 +156,7 @@ static void print_trace_address(void *data, unsigned long addr, int reliable)
{
touch_nmi_watchdog();
printk(data);
- printk_address(addr, reliable);
+ printk_stack_address(addr, reliable);
}

static const struct stacktrace_ops print_trace_ops = {
@@ -281,7 +286,7 @@ int __kprobes __die(const char *str, struct pt_regs *regs, long err)
#else
/* Executive summary in case the oops scrolled away */
printk(KERN_ALERT "RIP ");
- printk_address(regs->ip, 1);
+ printk_address(regs->ip);
printk(" RSP <%016lx>\n", regs->sp);
#endif
return 0;
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index bb1dc51bab05..8e9fe8dfd37b 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -63,7 +63,7 @@ void __show_regs(struct pt_regs *regs, int all)
unsigned int ds, cs, es;

printk(KERN_DEFAULT "RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->ip);
- printk_address(regs->ip, 1);
+ printk_address(regs->ip);
printk(KERN_DEFAULT "RSP: %04lx:%016lx EFLAGS: %08lx\n", regs->ss,
regs->sp, regs->flags);
printk(KERN_DEFAULT "RAX: %016lx RBX: %016lx RCX: %016lx\n",
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index d8b1ff68dbb9..5b90bbcad9f6 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -596,7 +596,7 @@ show_fault_oops(struct pt_regs *regs, unsigned long error_code,

printk(KERN_CONT " at %p\n", (void *) address);
printk(KERN_ALERT "IP:");
- printk_address(regs->ip, 1);
+ printk_address(regs->ip);

dump_pagetable(address);
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:19 UTC
Permalink
From: Mel Gorman <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 5d4cf996cf134e8ddb4f906b8197feb9267c2b77 upstream.

Commit 42eb088e (sched: Avoid NULL dereference on sd_busy) corrected a NULL
dereference on sd_busy but the fix also altered what scheduling domain it
used for the 'sd_llc' percpu variable.

One impact of this is that a task selecting a runqueue may consider
idle CPUs that are not cache siblings as candidates for running.
Tasks are then running on CPUs that are not cache hot.

This was found through bisection where ebizzy threads were not seeing equal
performance and it looked like a scheduling fairness issue. This patch
mitigates but does not completely fix the problem on all machines tested
implying there may be an additional bug or a common root cause. Here are
the average range of performance seen by individual ebizzy threads. It
was tested on top of candidate patches related to x86 TLB range flushing.

4-core machine
3.13.0-rc3 3.13.0-rc3
vanilla fixsd-v3r3
Mean 1 0.00 ( 0.00%) 0.00 ( 0.00%)
Mean 2 0.34 ( 0.00%) 0.10 ( 70.59%)
Mean 3 1.29 ( 0.00%) 0.93 ( 27.91%)
Mean 4 7.08 ( 0.00%) 0.77 ( 89.12%)
Mean 5 193.54 ( 0.00%) 2.14 ( 98.89%)
Mean 6 151.12 ( 0.00%) 2.06 ( 98.64%)
Mean 7 115.38 ( 0.00%) 2.04 ( 98.23%)
Mean 8 108.65 ( 0.00%) 1.92 ( 98.23%)

8-core machine
Mean 1 0.00 ( 0.00%) 0.00 ( 0.00%)
Mean 2 0.40 ( 0.00%) 0.21 ( 47.50%)
Mean 3 23.73 ( 0.00%) 0.89 ( 96.25%)
Mean 4 12.79 ( 0.00%) 1.04 ( 91.87%)
Mean 5 13.08 ( 0.00%) 2.42 ( 81.50%)
Mean 6 23.21 ( 0.00%) 69.46 (-199.27%)
Mean 7 15.85 ( 0.00%) 101.72 (-541.77%)
Mean 8 109.37 ( 0.00%) 19.13 ( 82.51%)
Mean 12 124.84 ( 0.00%) 28.62 ( 77.07%)
Mean 16 113.50 ( 0.00%) 24.16 ( 78.71%)

It's eliminated for one machine and reduced for another.

Signed-off-by: Mel Gorman <***@suse.de>
Signed-off-by: Peter Zijlstra <***@infradead.org>
Cc: Alex Shi <***@linaro.org>
Cc: Andrew Morton <***@linux-foundation.org>
Cc: Fengguang Wu <***@intel.com>
Cc: H Peter Anvin <***@zytor.com>
Cc: Linus Torvalds <***@linux-foundation.org>
Link: http://lkml.kernel.org/r/***@suse.de
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/sched/core.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 1313c6ccb03a..a494ace683e3 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5125,6 +5125,7 @@ DEFINE_PER_CPU(struct sched_domain *, sd_asym);
static void update_top_cache_domain(int cpu)
{
struct sched_domain *sd;
+ struct sched_domain *busy_sd = NULL;
int id = cpu;
int size = 1;

@@ -5132,9 +5133,9 @@ static void update_top_cache_domain(int cpu)
if (sd) {
id = cpumask_first(sched_domain_span(sd));
size = cpumask_weight(sched_domain_span(sd));
- sd = sd->parent; /* sd_busy */
+ busy_sd = sd->parent; /* sd_busy */
}
- rcu_assign_pointer(per_cpu(sd_busy, cpu), sd);
+ rcu_assign_pointer(per_cpu(sd_busy, cpu), busy_sd);

rcu_assign_pointer(per_cpu(sd_llc, cpu), sd);
per_cpu(sd_llc_size, cpu) = size;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:49 UTC
Permalink
From: Vlastimil Babka <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 9050d7eba40b3d79551668f54e68fd6f51945ef3 upstream.

Daniel Borkmann reported a VM_BUG_ON assertion failing:

------------[ cut here ]------------
kernel BUG at mm/mlock.c:528!
invalid opcode: 0000 [#1] SMP
Modules linked in: ccm arc4 iwldvm [...]
video
CPU: 3 PID: 2266 Comm: netsniff-ng Not tainted 3.14.0-rc2+ #8
Hardware name: LENOVO 2429BP3/2429BP3, BIOS G4ET37WW (1.12 ) 05/29/2012
task: ffff8801f87f9820 ti: ffff88002cb44000 task.ti: ffff88002cb44000
RIP: 0010:[<ffffffff81171ad0>] [<ffffffff81171ad0>] munlock_vma_pages_range+0x2e0/0x2f0
Call Trace:
do_munmap+0x18f/0x3b0
vm_munmap+0x41/0x60
SyS_munmap+0x22/0x30
system_call_fastpath+0x1a/0x1f
RIP munlock_vma_pages_range+0x2e0/0x2f0
---[ end trace a0088dcf07ae10f2 ]---

because munlock_vma_pages_range() thinks it's unexpectedly in the middle
of a THP page. This can be reproduced with default config since 3.11
kernels. A reproducer can be found in the kernel's selftest directory
for networking by running ./psock_tpacket.

The problem is that an order=2 compound page (allocated by
alloc_one_pg_vec_page() is part of the munlocked VM_MIXEDMAP vma (mapped
by packet_mmap()) and mistaken for a THP page and assumed to be order=9.

The checks for THP in munlock came with commit ff6a6da60b89 ("mm:
accelerate munlock() treatment of THP pages"), i.e. since 3.9, but did
not trigger a bug. It just makes munlock_vma_pages_range() skip such
compound pages until the next 512-pages-aligned page, when it encounters
a head page. This is however not a problem for vma's where mlocking has
no effect anyway, but it can distort the accounting.

Since commit 7225522bb429 ("mm: munlock: batch non-THP page isolation
and munlock+putback using pagevec") this can trigger a VM_BUG_ON in
PageTransHuge() check.

This patch fixes the issue by adding VM_MIXEDMAP flag to VM_SPECIAL, a
list of flags that make vma's non-mlockable and non-mergeable. The
reasoning is that VM_MIXEDMAP vma's are similar to VM_PFNMAP, which is
already on the VM_SPECIAL list, and both are intended for non-LRU pages
where mlocking makes no sense anyway. Related Lkml discussion can be
found in [2].

[1] tools/testing/selftests/net/psock_tpacket
[2] https://lkml.org/lkml/2014/1/10/427

Signed-off-by: Vlastimil Babka <***@suse.cz>
Signed-off-by: Daniel Borkmann <***@redhat.com>
Reported-by: Daniel Borkmann <***@redhat.com>
Tested-by: Daniel Borkmann <***@redhat.com>
Cc: Thomas Hellstrom <***@vmware.com>
Cc: John David Anglin <***@bell.net>
Cc: HATAYAMA Daisuke <***@jp.fujitsu.com>
Cc: Konstantin Khlebnikov <***@openvz.org>
Cc: Carsten Otte <***@de.ibm.com>
Cc: Jared Hulbert <***@gmail.com>
Tested-by: Hannes Frederic Sowa <***@stressinduktion.org>
Cc: Kirill A. Shutemov <***@linux.intel.com>
Acked-by: Rik van Riel <***@redhat.com>
Cc: Andrea Arcangeli <***@redhat.com>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
include/linux/mm.h | 2 +-
mm/huge_memory.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index fed08c0c543b..648bcb007eba 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -161,7 +161,7 @@ extern unsigned int kobjsize(const void *objp);
* Special vmas that are non-mergable, non-mlock()able.
* Note: mm/huge_memory.c VM_NO_THP depends on this definition.
*/
-#define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP)
+#define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP | VM_MIXEDMAP)

/*
* mapping from the currently active vm_flags protection bits (the
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index dd7789ce7572..389973fd6bb7 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1897,7 +1897,7 @@ out:
return ret;
}

-#define VM_NO_THP (VM_SPECIAL|VM_MIXEDMAP|VM_HUGETLB|VM_SHARED|VM_MAYSHARE)
+#define VM_NO_THP (VM_SPECIAL | VM_HUGETLB | VM_SHARED | VM_MAYSHARE)

int hugepage_madvise(struct vm_area_struct *vma,
unsigned long *vm_flags, int advice)
--
1.9.0
Jiri Slaby
2014-03-22 10:46:33 UTC
Permalink
From: Duan Jiong <***@cn.fujitsu.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit feff9ab2e7fa773b6a3965f77375fe89f7fd85cf ]

If the neigh table's entries is less than gc_thresh1, the function
will return directly, and the reachabletime will not be recompute,
so the reachabletime can be guessed.

Signed-off-by: Duan Jiong <***@cn.fujitsu.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/core/neighbour.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 11af243bf92f..467e3e071832 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -764,9 +764,6 @@ static void neigh_periodic_work(struct work_struct *work)
nht = rcu_dereference_protected(tbl->nht,
lockdep_is_held(&tbl->lock));

- if (atomic_read(&tbl->entries) < tbl->gc_thresh1)
- goto out;
-
/*
* periodically recompute ReachableTime from random function
*/
@@ -779,6 +776,9 @@ static void neigh_periodic_work(struct work_struct *work)
neigh_rand_reach_time(p->base_reachable_time);
}

+ if (atomic_read(&tbl->entries) < tbl->gc_thresh1)
+ goto out;
+
for (i = 0 ; i < (1 << nht->hash_shift); i++) {
np = &nht->hash_buckets[i];
--
1.9.0
Jiri Slaby
2014-03-22 10:46:34 UTC
Permalink
From: Jason Wang <***@redhat.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit 0e7ede80d929ff0f830c44a543daa1acd590c749 ]

We should alloc big buffers also when guest can receive UFO
packets to let the big packets fit into guest rx buffer.

Fixes 5c5167515d80f78f6bb538492c423adcae31ad65
(virtio-net: Allow UFO feature to be set and advertised.)

Cc: Rusty Russell <***@rustcorp.com.au>
Cc: Michael S. Tsirkin <***@redhat.com>
Cc: Sridhar Samudrala <***@us.ibm.com>
Signed-off-by: Jason Wang <***@redhat.com>
Acked-by: Michael S. Tsirkin <***@redhat.com>
Acked-by: Rusty Russell <***@rustcorp.com.au>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/virtio_net.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 8065066a6230..0232156dade3 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1621,7 +1621,8 @@ static int virtnet_probe(struct virtio_device *vdev)
/* If we can receive ANY GSO packets, we must allocate large ones. */
if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) ||
virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6) ||
- virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN))
+ virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN) ||
+ virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_UFO))
vi->big_packets = true;

if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF))
--
1.9.0
Jiri Slaby
2014-03-22 10:46:54 UTC
Permalink
From: Alexandre Bounine <***@idt.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 04379dffdd4da820d51a1566ad2e86f3b1ad97ed upstream.

This patch is a modification of the patch originally proposed by
Xiaotian Feng <***@gmail.com>: https://lkml.org/lkml/2012/11/5/413
This new version disables DMA channel interrupts and ensures that the
tasklet wil not be scheduled again before calling tasklet_kill().

Unfortunately the updated patch was not released at that time due to
planned rework of Tsi721 mport driver to use threaded interrupts (which
has yet to happen). Recently the issue was reported again:
https://lkml.org/lkml/2014/2/19/762.

Description from the original Xiaotian's patch:

"Some drivers use tasklet_disable in device remove/release process,
tasklet_disable will inc tasklet->count and return. If the tasklet is
not handled yet under some softirq pressure, the tasklet will be
placed on the tasklet_vec, never have a chance to be excuted. This
might lead to a heavy loaded ksoftirqd, wakeup with pending_softirq,
but tasklet is disabled. tasklet_kill should be used in this case."

This patch is applicable to kernel versions starting from v3.5.

Signed-off-by: Alexandre Bounine <***@idt.com>
Cc: Matt Porter <***@kernel.crashing.org>
Cc: Xiaotian Feng <***@gmail.com>
Reviewed-by: Thomas Gleixner <***@linutronix.de>
Cc: Mike Galbraith <***@online.de>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/rapidio/devices/tsi721.h | 1 +
drivers/rapidio/devices/tsi721_dma.c | 27 ++++++++++++++++++---------
2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/drivers/rapidio/devices/tsi721.h b/drivers/rapidio/devices/tsi721.h
index b4b0d83f9ef6..7061ac0ad428 100644
--- a/drivers/rapidio/devices/tsi721.h
+++ b/drivers/rapidio/devices/tsi721.h
@@ -678,6 +678,7 @@ struct tsi721_bdma_chan {
struct list_head free_list;
dma_cookie_t completed_cookie;
struct tasklet_struct tasklet;
+ bool active;
};

#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
diff --git a/drivers/rapidio/devices/tsi721_dma.c b/drivers/rapidio/devices/tsi721_dma.c
index 502663f5f7c6..91245f5dbe81 100644
--- a/drivers/rapidio/devices/tsi721_dma.c
+++ b/drivers/rapidio/devices/tsi721_dma.c
@@ -206,8 +206,8 @@ void tsi721_bdma_handler(struct tsi721_bdma_chan *bdma_chan)
{
/* Disable BDMA channel interrupts */
iowrite32(0, bdma_chan->regs + TSI721_DMAC_INTE);
-
- tasklet_schedule(&bdma_chan->tasklet);
+ if (bdma_chan->active)
+ tasklet_schedule(&bdma_chan->tasklet);
}

#ifdef CONFIG_PCI_MSI
@@ -562,7 +562,7 @@ static int tsi721_alloc_chan_resources(struct dma_chan *dchan)
}
#endif /* CONFIG_PCI_MSI */

- tasklet_enable(&bdma_chan->tasklet);
+ bdma_chan->active = true;
tsi721_bdma_interrupt_enable(bdma_chan, 1);

return bdma_chan->bd_num - 1;
@@ -576,9 +576,7 @@ err_out:
static void tsi721_free_chan_resources(struct dma_chan *dchan)
{
struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
-#ifdef CONFIG_PCI_MSI
struct tsi721_device *priv = to_tsi721(dchan->device);
-#endif
LIST_HEAD(list);

dev_dbg(dchan->device->dev, "%s: Entry\n", __func__);
@@ -589,14 +587,25 @@ static void tsi721_free_chan_resources(struct dma_chan *dchan)
BUG_ON(!list_empty(&bdma_chan->active_list));
BUG_ON(!list_empty(&bdma_chan->queue));

- tasklet_disable(&bdma_chan->tasklet);
+ tsi721_bdma_interrupt_enable(bdma_chan, 0);
+ bdma_chan->active = false;
+
+#ifdef CONFIG_PCI_MSI
+ if (priv->flags & TSI721_USING_MSIX) {
+ synchronize_irq(priv->msix[TSI721_VECT_DMA0_DONE +
+ bdma_chan->id].vector);
+ synchronize_irq(priv->msix[TSI721_VECT_DMA0_INT +
+ bdma_chan->id].vector);
+ } else
+#endif
+ synchronize_irq(priv->pdev->irq);
+
+ tasklet_kill(&bdma_chan->tasklet);

spin_lock_bh(&bdma_chan->lock);
list_splice_init(&bdma_chan->free_list, &list);
spin_unlock_bh(&bdma_chan->lock);

- tsi721_bdma_interrupt_enable(bdma_chan, 0);
-
#ifdef CONFIG_PCI_MSI
if (priv->flags & TSI721_USING_MSIX) {
free_irq(priv->msix[TSI721_VECT_DMA0_DONE +
@@ -790,6 +799,7 @@ int tsi721_register_dma(struct tsi721_device *priv)
bdma_chan->dchan.cookie = 1;
bdma_chan->dchan.chan_id = i;
bdma_chan->id = i;
+ bdma_chan->active = false;

spin_lock_init(&bdma_chan->lock);

@@ -799,7 +809,6 @@ int tsi721_register_dma(struct tsi721_device *priv)

tasklet_init(&bdma_chan->tasklet, tsi721_dma_tasklet,
(unsigned long)bdma_chan);
- tasklet_disable(&bdma_chan->tasklet);
list_add_tail(&bdma_chan->dchan.device_node,
&mport->dma.channels);
}
--
1.9.0
Jiri Slaby
2014-03-22 10:47:19 UTC
Permalink
From: Takashi Iwai <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 9b745ab897199c2af9f21ca9681ef86d5b971002 upstream.

Lenovo IdeaPad 410Y with ALC282 codec makes loud click noises at boot
and shutdown. Also, it wrongly misdetects the acpi_thinkpad hook.
This patch adds a device-specific fixup for disabling the shutup
callback that is the cause of the click noise and also avoiding the
thinpad_helper calls.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=71511
Reported-and-tested-by: Guilherme Amadio <***@gmail.com>
Signed-off-by: Takashi Iwai <***@suse.de>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
sound/pci/hda/patch_realtek.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index d19606b68b96..deddee9c1565 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3464,6 +3464,19 @@ static void alc_fixup_headset_mode_no_hp_mic(struct hda_codec *codec,
alc_fixup_headset_mode(codec, fix, action);
}

+static void alc_no_shutup(struct hda_codec *codec)
+{
+}
+
+static void alc_fixup_no_shutup(struct hda_codec *codec,
+ const struct hda_fixup *fix, int action)
+{
+ if (action == HDA_FIXUP_ACT_PRE_PROBE) {
+ struct alc_spec *spec = codec->spec;
+ spec->shutup = alc_no_shutup;
+ }
+}
+
static void alc_fixup_headset_mode_alc668(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
@@ -3674,6 +3687,7 @@ enum {
ALC269_FIXUP_HP_GPIO_LED,
ALC269_FIXUP_INV_DMIC,
ALC269_FIXUP_LENOVO_DOCK,
+ ALC269_FIXUP_NO_SHUTUP,
ALC286_FIXUP_SONY_MIC_NO_PRESENCE,
ALC269_FIXUP_PINCFG_NO_HP_TO_LINEOUT,
ALC269_FIXUP_DELL1_MIC_NO_PRESENCE,
@@ -3840,6 +3854,10 @@ static const struct hda_fixup alc269_fixups[] = {
.type = HDA_FIXUP_FUNC,
.v.func = alc_fixup_inv_dmic_0x12,
},
+ [ALC269_FIXUP_NO_SHUTUP] = {
+ .type = HDA_FIXUP_FUNC,
+ .v.func = alc_fixup_no_shutup,
+ },
[ALC269_FIXUP_LENOVO_DOCK] = {
.type = HDA_FIXUP_PINS,
.v.pins = (const struct hda_pintbl[]) {
@@ -4090,6 +4108,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
SND_PCI_QUIRK(0x17aa, 0x2212, "Thinkpad", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
SND_PCI_QUIRK(0x17aa, 0x2214, "Thinkpad", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
SND_PCI_QUIRK(0x17aa, 0x2215, "Thinkpad", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
+ SND_PCI_QUIRK(0x17aa, 0x3978, "IdeaPad Y410P", ALC269_FIXUP_NO_SHUTUP),
SND_PCI_QUIRK(0x17aa, 0x5013, "Thinkpad", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
SND_PCI_QUIRK(0x17aa, 0x501a, "Thinkpad", ALC283_FIXUP_INT_MIC),
SND_PCI_QUIRK(0x17aa, 0x5026, "Thinkpad", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
--
1.9.0
Jiri Slaby
2014-03-22 10:47:13 UTC
Permalink
From: Amitkumar Karwar <***@marvell.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit d51246481c7f28bbfa1f814ded2da65e531cd4b2 upstream.

While preparing association request, intersection of device's
VHT capability information and corresponding field advertised
by AP is used.

This patch fixes a couple errors while saving and copying vht_cap
and vht_oper fields from AP's beacon.

Signed-off-by: Amitkumar Karwar <***@marvell.com>
Signed-off-by: Bing Zhao <***@marvell.com>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/mwifiex/11ac.c | 3 +--
drivers/net/wireless/mwifiex/scan.c | 8 ++++----
2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/mwifiex/11ac.c b/drivers/net/wireless/mwifiex/11ac.c
index 5e0eec4d71c7..5d9a8084665d 100644
--- a/drivers/net/wireless/mwifiex/11ac.c
+++ b/drivers/net/wireless/mwifiex/11ac.c
@@ -189,8 +189,7 @@ int mwifiex_cmd_append_11ac_tlv(struct mwifiex_private *priv,
vht_cap->header.len =
cpu_to_le16(sizeof(struct ieee80211_vht_cap));
memcpy((u8 *)vht_cap + sizeof(struct mwifiex_ie_types_header),
- (u8 *)bss_desc->bcn_vht_cap +
- sizeof(struct ieee_types_header),
+ (u8 *)bss_desc->bcn_vht_cap,
le16_to_cpu(vht_cap->header.len));

mwifiex_fill_vht_cap_tlv(priv, vht_cap, bss_desc->bss_band);
diff --git a/drivers/net/wireless/mwifiex/scan.c b/drivers/net/wireless/mwifiex/scan.c
index ba48e64673d9..a17d4675ddc0 100644
--- a/drivers/net/wireless/mwifiex/scan.c
+++ b/drivers/net/wireless/mwifiex/scan.c
@@ -2101,12 +2101,12 @@ mwifiex_save_curr_bcn(struct mwifiex_private *priv)
curr_bss->ht_info_offset);

if (curr_bss->bcn_vht_cap)
- curr_bss->bcn_ht_cap = (void *)(curr_bss->beacon_buf +
- curr_bss->vht_cap_offset);
+ curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf +
+ curr_bss->vht_cap_offset);

if (curr_bss->bcn_vht_oper)
- curr_bss->bcn_ht_oper = (void *)(curr_bss->beacon_buf +
- curr_bss->vht_info_offset);
+ curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf +
+ curr_bss->vht_info_offset);

if (curr_bss->bcn_bss_co_2040)
curr_bss->bcn_bss_co_2040 =
--
1.9.0
Jiri Slaby
2014-03-22 10:47:00 UTC
Permalink
From: Sujith Manoharan <***@qca.qualcomm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit b3050248c167871ca52cfdb2ce78aa2460249346 upstream.

The minimum CCA power threshold values have to be adjusted
for existing cards to be in compliance with new regulations.
Newer cards will make use of the values obtained from EEPROM,
support for this was added earlier. To make sure that cards
that are already in use and don't have proper values in EEPROM,
do not violate regulations, use the initvals instead.

Reported-by: Jeang Daniel <***@qca.qualcomm.com>
Signed-off-by: Sujith Manoharan <***@qca.qualcomm.com>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/ath/ath9k/ar9462_2p0_initvals.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ar9462_2p0_initvals.h b/drivers/net/wireless/ath/ath9k/ar9462_2p0_initvals.h
index 092b9d412e7f..1078fbd7bda2 100644
--- a/drivers/net/wireless/ath/ath9k/ar9462_2p0_initvals.h
+++ b/drivers/net/wireless/ath/ath9k/ar9462_2p0_initvals.h
@@ -56,7 +56,7 @@ static const u32 ar9462_2p0_baseband_postamble[][5] = {
{0x00009e14, 0x37b95d5e, 0x37b9605e, 0x3236605e, 0x32365a5e},
{0x00009e18, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
{0x00009e1c, 0x0001cf9c, 0x0001cf9c, 0x00021f9c, 0x00021f9c},
- {0x00009e20, 0x000003b5, 0x000003b5, 0x000003ce, 0x000003ce},
+ {0x00009e20, 0x000003a5, 0x000003a5, 0x000003a5, 0x000003a5},
{0x00009e2c, 0x0000001c, 0x0000001c, 0x00000021, 0x00000021},
{0x00009e3c, 0xcf946220, 0xcf946220, 0xcfd5c782, 0xcfd5c282},
{0x00009e44, 0x62321e27, 0x62321e27, 0xfe291e27, 0xfe291e27},
@@ -95,7 +95,7 @@ static const u32 ar9462_2p0_baseband_postamble[][5] = {
{0x0000ae04, 0x001c0000, 0x001c0000, 0x001c0000, 0x00100000},
{0x0000ae18, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
{0x0000ae1c, 0x0000019c, 0x0000019c, 0x0000019c, 0x0000019c},
- {0x0000ae20, 0x000001b5, 0x000001b5, 0x000001ce, 0x000001ce},
+ {0x0000ae20, 0x000001a6, 0x000001a6, 0x000001aa, 0x000001aa},
{0x0000b284, 0x00000000, 0x00000000, 0x00000550, 0x00000550},
};
--
1.9.0
Jiri Slaby
2014-03-22 10:46:50 UTC
Permalink
From: Jan Kara <***@suse.cz>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 15c34a760630ca2c803848fba90ca0646a9907dd upstream.

Global quota files are accessed from different nodes. Thus we cannot
cache offset of quota structure in the quota file after we drop our node
reference count to it because after that moment quota structure may be
freed and reallocated elsewhere by a different node resulting in
corruption of quota file.

Fix the problem by clearing dq_off when we are releasing dquot structure.
We also remove the DB_READ_B handling because it is useless -
DQ_ACTIVE_B is set iff DQ_READ_B is set.

Signed-off-by: Jan Kara <***@suse.cz>
Cc: Goldwyn Rodrigues <***@suse.de>
Cc: Joel Becker <***@evilplan.org>
Reviewed-by: Mark Fasheh <***@suse.de>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/ocfs2/quota_global.c | 27 +++++++++++++++++----------
fs/ocfs2/quota_local.c | 4 ----
2 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index aaa50611ec66..d7b5108789e2 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -717,6 +717,12 @@ static int ocfs2_release_dquot(struct dquot *dquot)
*/
if (status < 0)
mlog_errno(status);
+ /*
+ * Clear dq_off so that we search for the structure in quota file next
+ * time we acquire it. The structure might be deleted and reallocated
+ * elsewhere by another node while our dquot structure is on freelist.
+ */
+ dquot->dq_off = 0;
clear_bit(DQ_ACTIVE_B, &dquot->dq_flags);
out_trans:
ocfs2_commit_trans(osb, handle);
@@ -756,16 +762,17 @@ static int ocfs2_acquire_dquot(struct dquot *dquot)
status = ocfs2_lock_global_qf(info, 1);
if (status < 0)
goto out;
- if (!test_bit(DQ_READ_B, &dquot->dq_flags)) {
- status = ocfs2_qinfo_lock(info, 0);
- if (status < 0)
- goto out_dq;
- status = qtree_read_dquot(&info->dqi_gi, dquot);
- ocfs2_qinfo_unlock(info, 0);
- if (status < 0)
- goto out_dq;
- }
- set_bit(DQ_READ_B, &dquot->dq_flags);
+ status = ocfs2_qinfo_lock(info, 0);
+ if (status < 0)
+ goto out_dq;
+ /*
+ * We always want to read dquot structure from disk because we don't
+ * know what happened with it while it was on freelist.
+ */
+ status = qtree_read_dquot(&info->dqi_gi, dquot);
+ ocfs2_qinfo_unlock(info, 0);
+ if (status < 0)
+ goto out_dq;

OCFS2_DQUOT(dquot)->dq_use_count++;
OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index 2e4344be3b96..2001862bf2b1 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -1303,10 +1303,6 @@ int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);

out:
- /* Clear the read bit so that next time someone uses this
- * dquot he reads fresh info from disk and allocates local
- * dquot structure */
- clear_bit(DQ_READ_B, &dquot->dq_flags);
return status;
}
--
1.9.0
Jiri Slaby
2014-03-22 10:46:16 UTC
Permalink
From: Preeti U Murthy <***@linux.vnet.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 37dc6b50cee97954c4e6edcd5b1fa614b76038ee upstream.

nr_busy_cpus parameter is used by nohz_kick_needed() to find out the
number of busy cpus in a sched domain which has SD_SHARE_PKG_RESOURCES
flag set. Therefore instead of updating nr_busy_cpus at every level
of sched domain, since it is irrelevant, we can update this parameter
only at the parent domain of the sd which has this flag set. Introduce
a per-cpu parameter sd_busy which represents this parent domain.

In nohz_kick_needed() we directly query the nr_busy_cpus parameter
associated with the groups of sd_busy.

By associating sd_busy with the highest domain which has
SD_SHARE_PKG_RESOURCES flag set, we cover all lower level domains
which could have this flag set and trigger nohz_idle_balancing if any
of the levels have more than one busy cpu.

sd_busy is irrelevant for asymmetric load balancing. However sd_asym
has been introduced to represent the highest sched domain which has
SD_ASYM_PACKING flag set so that it can be queried directly when
required.

While we are at it, we might as well change the nohz_idle parameter to
be updated at the sd_busy domain level alone and not the base domain
level of a CPU. This will unify the concept of busy cpus at just one
level of sched domain where it is currently used.

Signed-off-by: Preeti U Murthy<***@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <***@infradead.org>
Cc: ***@linux.vnet.ibm.com
Cc: ***@linaro.org
Cc: ***@online.de
Cc: ***@kernel.crashing.org
Cc: ***@samba.org
Cc: ***@arm.com
Cc: ***@google.com
Cc: ***@infradead.org
Cc: ***@neuling.org
Link: http://lkml.kernel.org/r/***@preeti.in.ibm.com
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/sched/core.c | 6 ++++++
kernel/sched/fair.c | 38 ++++++++++++++++++++------------------
kernel/sched/sched.h | 2 ++
3 files changed, 28 insertions(+), 18 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index ceae65e69a64..6135b7c6bcfe 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5119,6 +5119,8 @@ static void destroy_sched_domains(struct sched_domain *sd, int cpu)
DEFINE_PER_CPU(struct sched_domain *, sd_llc);
DEFINE_PER_CPU(int, sd_llc_size);
DEFINE_PER_CPU(int, sd_llc_id);
+DEFINE_PER_CPU(struct sched_domain *, sd_busy);
+DEFINE_PER_CPU(struct sched_domain *, sd_asym);

static void update_top_cache_domain(int cpu)
{
@@ -5130,11 +5132,15 @@ static void update_top_cache_domain(int cpu)
if (sd) {
id = cpumask_first(sched_domain_span(sd));
size = cpumask_weight(sched_domain_span(sd));
+ rcu_assign_pointer(per_cpu(sd_busy, cpu), sd->parent);
}

rcu_assign_pointer(per_cpu(sd_llc, cpu), sd);
per_cpu(sd_llc_size, cpu) = size;
per_cpu(sd_llc_id, cpu) = id;
+
+ sd = highest_flag_domain(cpu, SD_ASYM_PACKING);
+ rcu_assign_pointer(per_cpu(sd_asym, cpu), sd);
}

/*
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 68648f652dca..bbfb3dc53eb4 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5598,16 +5598,16 @@ static inline void nohz_balance_exit_idle(int cpu)
static inline void set_cpu_sd_state_busy(void)
{
struct sched_domain *sd;
+ int cpu = smp_processor_id();

rcu_read_lock();
- sd = rcu_dereference_check_sched_domain(this_rq()->sd);
+ sd = rcu_dereference(per_cpu(sd_busy, cpu));

if (!sd || !sd->nohz_idle)
goto unlock;
sd->nohz_idle = 0;

- for (; sd; sd = sd->parent)
- atomic_inc(&sd->groups->sgp->nr_busy_cpus);
+ atomic_inc(&sd->groups->sgp->nr_busy_cpus);
unlock:
rcu_read_unlock();
}
@@ -5615,16 +5615,16 @@ unlock:
void set_cpu_sd_state_idle(void)
{
struct sched_domain *sd;
+ int cpu = smp_processor_id();

rcu_read_lock();
- sd = rcu_dereference_check_sched_domain(this_rq()->sd);
+ sd = rcu_dereference(per_cpu(sd_busy, cpu));

if (!sd || sd->nohz_idle)
goto unlock;
sd->nohz_idle = 1;

- for (; sd; sd = sd->parent)
- atomic_dec(&sd->groups->sgp->nr_busy_cpus);
+ atomic_dec(&sd->groups->sgp->nr_busy_cpus);
unlock:
rcu_read_unlock();
}
@@ -5807,6 +5807,8 @@ static inline int nohz_kick_needed(struct rq *rq, int cpu)
{
unsigned long now = jiffies;
struct sched_domain *sd;
+ struct sched_group_power *sgp;
+ int nr_busy;

if (unlikely(idle_cpu(cpu)))
return 0;
@@ -5832,22 +5834,22 @@ static inline int nohz_kick_needed(struct rq *rq, int cpu)
goto need_kick;

rcu_read_lock();
- for_each_domain(cpu, sd) {
- struct sched_group *sg = sd->groups;
- struct sched_group_power *sgp = sg->sgp;
- int nr_busy = atomic_read(&sgp->nr_busy_cpus);
+ sd = rcu_dereference(per_cpu(sd_busy, cpu));

- if (sd->flags & SD_SHARE_PKG_RESOURCES && nr_busy > 1)
- goto need_kick_unlock;
+ if (sd) {
+ sgp = sd->groups->sgp;
+ nr_busy = atomic_read(&sgp->nr_busy_cpus);

- if (sd->flags & SD_ASYM_PACKING
- && (cpumask_first_and(nohz.idle_cpus_mask,
- sched_domain_span(sd)) < cpu))
+ if (nr_busy > 1)
goto need_kick_unlock;
-
- if (!(sd->flags & (SD_SHARE_PKG_RESOURCES | SD_ASYM_PACKING)))
- break;
}
+
+ sd = rcu_dereference(per_cpu(sd_asym, cpu));
+
+ if (sd && (cpumask_first_and(nohz.idle_cpus_mask,
+ sched_domain_span(sd)) < cpu))
+ goto need_kick_unlock;
+
rcu_read_unlock();
return 0;

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index a6208afd80e7..4f310592b1ba 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -596,6 +596,8 @@ static inline struct sched_domain *highest_flag_domain(int cpu, int flag)
DECLARE_PER_CPU(struct sched_domain *, sd_llc);
DECLARE_PER_CPU(int, sd_llc_size);
DECLARE_PER_CPU(int, sd_llc_id);
+DECLARE_PER_CPU(struct sched_domain *, sd_busy);
+DECLARE_PER_CPU(struct sched_domain *, sd_asym);

struct sched_group_power {
atomic_t ref;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:18 UTC
Permalink
From: Peter Zijlstra <***@infradead.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 8e8339a3a1069141985daaa2521ba304509ddecd upstream.

Yinghai reported that he saw a /0 in sg_capacity on his EX parts.
Make sure to always initialize power_orig now that we actually use it.

Ideally build_sched_domains() -> init_sched_groups_power() would also
initialize this; but for some yet unexplained reason some setups seem
to miss updates there.

Reported-by: Yinghai Lu <***@kernel.org>
Tested-by: Yinghai Lu <***@kernel.org>
Signed-off-by: Peter Zijlstra <***@infradead.org>
Link: http://lkml.kernel.org/n/tip-***@git.kernel.org
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/sched/core.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index bc2f26d03751..1313c6ccb03a 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5332,6 +5332,7 @@ build_overlap_sched_groups(struct sched_domain *sd, int cpu)
* die on a /0 trap.
*/
sg->sgp->power = SCHED_POWER_SCALE * cpumask_weight(sg_span);
+ sg->sgp->power_orig = sg->sgp->power;

/*
* Make sure the first group of this domain contains the
--
1.9.0
Jiri Slaby
2014-03-22 10:46:12 UTC
Permalink
From: Vaidyanathan Srinivasan <***@linux.vnet.ibm.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 2042abe7977222ef606306faa2dce8fd51e98e65 upstream.

Asymmetric scheduling within a core is a scheduler loadbalancing
feature that is triggered when SD_ASYM_PACKING flag is set. The goal
for the load balancer is to move tasks to lower order idle SMT threads
within a core on a POWER7 system.

In nohz_kick_needed(), we intend to check if our sched domain (core)
is completely busy or we have idle cpu.

The following check for SD_ASYM_PACKING:

(cpumask_first_and(nohz.idle_cpus_mask, sched_domain_span(sd)) < cpu)

already covers the case of checking if the domain has an idle cpu,
because cpumask_first_and() will not yield any set bits if this domain
has no idle cpu.

Hence, nr_busy check against group weight can be removed.

Reported-by: Michael Neuling <***@au1.ibm.com>
Signed-off-by: Vaidyanathan Srinivasan <***@linux.vnet.ibm.com>
Signed-off-by: Preeti U Murthy <***@linux.vnet.ibm.com>
Tested-by: Michael Neuling <***@neuling.org>
Signed-off-by: Peter Zijlstra <***@infradead.org>
Cc: ***@linaro.org
Cc: ***@online.de
Cc: ***@kernel.crashing.org
Cc: ***@samba.org
Cc: ***@arm.com
Cc: ***@google.com
Link: http://lkml.kernel.org/r/***@preeti.in.ibm.com
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/sched/fair.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 411732334906..68648f652dca 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5840,7 +5840,7 @@ static inline int nohz_kick_needed(struct rq *rq, int cpu)
if (sd->flags & SD_SHARE_PKG_RESOURCES && nr_busy > 1)
goto need_kick_unlock;

- if (sd->flags & SD_ASYM_PACKING && nr_busy != sg->group_weight
+ if (sd->flags & SD_ASYM_PACKING
&& (cpumask_first_and(nohz.idle_cpus_mask,
sched_domain_span(sd)) < cpu))
goto need_kick_unlock;
--
1.9.0
Jiri Slaby
2014-03-22 10:47:09 UTC
Permalink
From: Amitkumar Karwar <***@marvell.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit bb8e6a1ee881d131e404f0f1f5e8dc9281002771 upstream.

We may get a NULL pointer here if skb allocation for Rx packet
was failed earlier.

Signed-off-by: Amitkumar Karwar <***@marvell.com>
Signed-off-by: Bing Zhao <***@marvell.com>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/mwifiex/pcie.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c
index 52da8ee7599a..b159f50f7fc1 100644
--- a/drivers/net/wireless/mwifiex/pcie.c
+++ b/drivers/net/wireless/mwifiex/pcie.c
@@ -1212,6 +1212,12 @@ static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter)
rd_index = card->rxbd_rdptr & reg->rx_mask;
skb_data = card->rx_buf_list[rd_index];

+ /* If skb allocation was failed earlier for Rx packet,
+ * rx_buf_list[rd_index] would have been left with a NULL.
+ */
+ if (!skb_data)
+ return -ENOMEM;
+
MWIFIEX_SKB_PACB(skb_data, &buf_pa);
pci_unmap_single(card->dev, buf_pa, MWIFIEX_RX_DATA_BUF_SIZE,
PCI_DMA_FROMDEVICE);
--
1.9.0
Jiri Slaby
2014-03-22 10:46:21 UTC
Permalink
From: Shawn Bohrer <***@rgmadvisors.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 6bfa687c19b7ab8adee03f0d43c197c2945dd869 upstream.

In 76854c7e8f3f4172fef091e78d88b3b751463ac6 ("sched: Use
rt.nr_cpus_allowed to recover select_task_rq() cycles") an
optimization was added to select_task_rq_rt() that immediately
returns when p->nr_cpus_allowed == 1 at the beginning of the
function.

This makes the latter p->nr_cpus_allowed > 1 check redundant,
which can now be removed.

Signed-off-by: Shawn Bohrer <***@rgmadvisors.com>
Reviewed-by: Steven Rostedt <***@goodmis.org>
Cc: Mike Galbraith <***@suse.de>
Cc: ***@rgmadvisors.com
Cc: Peter Zijlstra <***@infradead.org>
Link: http://lkml.kernel.org/r/1380914693-24634-1-git-send-email-***@gmail.com
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/sched/rt.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 0c7886ff263e..ff04e1a06412 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1229,8 +1229,7 @@ select_task_rq_rt(struct task_struct *p, int sd_flag, int flags)
*/
if (curr && unlikely(rt_task(curr)) &&
(curr->nr_cpus_allowed < 2 ||
- curr->prio <= p->prio) &&
- (p->nr_cpus_allowed > 1)) {
+ curr->prio <= p->prio)) {
int target = find_lowest_rq(p);

if (target != -1)
--
1.9.0
Jiri Slaby
2014-03-22 10:46:25 UTC
Permalink
From: Jason Baron <***@akamai.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 67347fe4e6326338ee217d7eb826bedf30b2e155 upstream.

When calling EPOLL_CTL_ADD for an epoll file descriptor that is attached
directly to a wakeup source, we do not need to take the global 'epmutex',
unless the epoll file descriptor is nested. The purpose of taking the
'epmutex' on add is to prevent complex topologies such as loops and deep
wakeup paths from forming in parallel through multiple EPOLL_CTL_ADD
operations. However, for the simple case of an epoll file descriptor
attached directly to a wakeup source (with no nesting), we do not need to
hold the 'epmutex'.

This patch along with 'epoll: optimize EPOLL_CTL_DEL using rcu' improves
scalability on larger systems. Quoting Nathan Zimmer's mail on SPECjbb
performance:

"On the 16 socket run the performance went from 35k jOPS to 125k jOPS. In
addition the benchmark when from scaling well on 10 sockets to scaling
well on just over 40 sockets.

...

Currently the benchmark stops scaling at around 40-44 sockets but it seems like
I found a second unrelated bottleneck."

[***@linux-foundation.org: use `bool' for boolean variables, remove unneeded/undesirable cast of void*, add missed ep_scan_ready_list() kerneldoc]
Signed-off-by: Jason Baron <***@akamai.com>
Tested-by: Nathan Zimmer <***@sgi.com>
Cc: Eric Wong <***@yhbt.net>
Cc: Nelson Elhage <***@nelhage.com>
Cc: Al Viro <***@zeniv.linux.org.uk>
Cc: Davide Libenzi <***@xmailserver.org>
Cc: "Paul E. McKenney" <***@us.ibm.com>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/eventpoll.c | 95 ++++++++++++++++++++++++++++++++++++++++++----------------
1 file changed, 69 insertions(+), 26 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 584249454822..f7fe7e3ce664 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -585,14 +585,14 @@ static inline void ep_pm_stay_awake_rcu(struct epitem *epi)
* @sproc: Pointer to the scan callback.
* @priv: Private opaque data passed to the @sproc callback.
* @depth: The current depth of recursive f_op->poll calls.
+ * @ep_locked: caller already holds ep->mtx
*
* Returns: The same integer error code returned by the @sproc callback.
*/
static int ep_scan_ready_list(struct eventpoll *ep,
int (*sproc)(struct eventpoll *,
struct list_head *, void *),
- void *priv,
- int depth)
+ void *priv, int depth, bool ep_locked)
{
int error, pwake = 0;
unsigned long flags;
@@ -603,7 +603,9 @@ static int ep_scan_ready_list(struct eventpoll *ep,
* We need to lock this because we could be hit by
* eventpoll_release_file() and epoll_ctl().
*/
- mutex_lock_nested(&ep->mtx, depth);
+
+ if (!ep_locked)
+ mutex_lock_nested(&ep->mtx, depth);

/*
* Steal the ready list, and re-init the original one to the
@@ -667,7 +669,8 @@ static int ep_scan_ready_list(struct eventpoll *ep,
}
spin_unlock_irqrestore(&ep->lock, flags);

- mutex_unlock(&ep->mtx);
+ if (!ep_locked)
+ mutex_unlock(&ep->mtx);

/* We have to call this outside the lock */
if (pwake)
@@ -822,15 +825,34 @@ static int ep_read_events_proc(struct eventpoll *ep, struct list_head *head,
return 0;
}

+static void ep_ptable_queue_proc(struct file *file, wait_queue_head_t *whead,
+ poll_table *pt);
+
+struct readyevents_arg {
+ struct eventpoll *ep;
+ bool locked;
+};
+
static int ep_poll_readyevents_proc(void *priv, void *cookie, int call_nests)
{
- return ep_scan_ready_list(priv, ep_read_events_proc, NULL, call_nests + 1);
+ struct readyevents_arg *arg = priv;
+
+ return ep_scan_ready_list(arg->ep, ep_read_events_proc, NULL,
+ call_nests + 1, arg->locked);
}

static unsigned int ep_eventpoll_poll(struct file *file, poll_table *wait)
{
int pollflags;
struct eventpoll *ep = file->private_data;
+ struct readyevents_arg arg;
+
+ /*
+ * During ep_insert() we already hold the ep->mtx for the tfile.
+ * Prevent re-aquisition.
+ */
+ arg.locked = wait && (wait->_qproc == ep_ptable_queue_proc);
+ arg.ep = ep;

/* Insert inside our poll wait queue */
poll_wait(file, &ep->poll_wait, wait);
@@ -842,7 +864,7 @@ static unsigned int ep_eventpoll_poll(struct file *file, poll_table *wait)
* could re-enter here.
*/
pollflags = ep_call_nested(&poll_readywalk_ncalls, EP_MAX_NESTS,
- ep_poll_readyevents_proc, ep, ep, current);
+ ep_poll_readyevents_proc, &arg, ep, current);

return pollflags != -1 ? pollflags : 0;
}
@@ -1243,7 +1265,7 @@ static noinline void ep_destroy_wakeup_source(struct epitem *epi)
* Must be called with "mtx" held.
*/
static int ep_insert(struct eventpoll *ep, struct epoll_event *event,
- struct file *tfile, int fd)
+ struct file *tfile, int fd, int full_check)
{
int error, revents, pwake = 0;
unsigned long flags;
@@ -1309,7 +1331,7 @@ static int ep_insert(struct eventpoll *ep, struct epoll_event *event,

/* now check if we've created too many backpaths */
error = -EINVAL;
- if (reverse_path_check())
+ if (full_check && reverse_path_check())
goto error_remove_epi;

/* We have to drop the new item inside our item list to keep track of it */
@@ -1532,7 +1554,7 @@ static int ep_send_events(struct eventpoll *ep,
esed.maxevents = maxevents;
esed.events = events;

- return ep_scan_ready_list(ep, ep_send_events_proc, &esed, 0);
+ return ep_scan_ready_list(ep, ep_send_events_proc, &esed, 0, false);
}

static inline struct timespec ep_set_mstimeout(long ms)
@@ -1802,11 +1824,12 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
struct epoll_event __user *, event)
{
int error;
- int did_lock_epmutex = 0;
+ int full_check = 0;
struct fd f, tf;
struct eventpoll *ep;
struct epitem *epi;
struct epoll_event epds;
+ struct eventpoll *tep = NULL;

error = -EFAULT;
if (ep_op_has_event(op) &&
@@ -1855,23 +1878,40 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
* and hang them on the tfile_check_list, so we can check that we
* haven't created too many possible wakeup paths.
*
- * We need to hold the epmutex across ep_insert to prevent
- * multple adds from creating loops in parallel.
+ * We do not need to take the global 'epumutex' on EPOLL_CTL_ADD when
+ * the epoll file descriptor is attaching directly to a wakeup source,
+ * unless the epoll file descriptor is nested. The purpose of taking the
+ * 'epmutex' on add is to prevent complex toplogies such as loops and
+ * deep wakeup paths from forming in parallel through multiple
+ * EPOLL_CTL_ADD operations.
*/
+ mutex_lock_nested(&ep->mtx, 0);
if (op == EPOLL_CTL_ADD) {
- mutex_lock(&epmutex);
- did_lock_epmutex = 1;
- if (is_file_epoll(tf.file)) {
- error = -ELOOP;
- if (ep_loop_check(ep, tf.file) != 0) {
- clear_tfile_check_list();
- goto error_tgt_fput;
+ if (!list_empty(&f.file->f_ep_links) ||
+ is_file_epoll(tf.file)) {
+ full_check = 1;
+ mutex_unlock(&ep->mtx);
+ mutex_lock(&epmutex);
+ if (is_file_epoll(tf.file)) {
+ error = -ELOOP;
+ if (ep_loop_check(ep, tf.file) != 0) {
+ clear_tfile_check_list();
+ goto error_tgt_fput;
+ }
+ } else
+ list_add(&tf.file->f_tfile_llink,
+ &tfile_check_list);
+ mutex_lock_nested(&ep->mtx, 0);
+ if (is_file_epoll(tf.file)) {
+ tep = tf.file->private_data;
+ mutex_lock_nested(&tep->mtx, 1);
}
- } else
- list_add(&tf.file->f_tfile_llink, &tfile_check_list);
+ }
+ }
+ if (op == EPOLL_CTL_DEL && is_file_epoll(tf.file)) {
+ tep = tf.file->private_data;
+ mutex_lock_nested(&tep->mtx, 1);
}
-
- mutex_lock_nested(&ep->mtx, 0);

/*
* Try to lookup the file inside our RB tree, Since we grabbed "mtx"
@@ -1885,10 +1925,11 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
case EPOLL_CTL_ADD:
if (!epi) {
epds.events |= POLLERR | POLLHUP;
- error = ep_insert(ep, &epds, tf.file, fd);
+ error = ep_insert(ep, &epds, tf.file, fd, full_check);
} else
error = -EEXIST;
- clear_tfile_check_list();
+ if (full_check)
+ clear_tfile_check_list();
break;
case EPOLL_CTL_DEL:
if (epi)
@@ -1904,10 +1945,12 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
error = -ENOENT;
break;
}
+ if (tep != NULL)
+ mutex_unlock(&tep->mtx);
mutex_unlock(&ep->mtx);

error_tgt_fput:
- if (did_lock_epmutex)
+ if (full_check)
mutex_unlock(&epmutex);

fdput(tf);
--
1.9.0
Jiri Slaby
2014-03-22 10:47:10 UTC
Permalink
From: Amitkumar Karwar <***@marvell.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 1c97560f6d751a620978504a4a888c631192b71a upstream.

We are sending sleep confirm done interrupt in the middle of
sleep handshake. There is a corner case when Tx done interrupt
is received from firmware during sleep handshake due to which
host and firmware power states go out of sync causing cmd and
Tx data timeout problem.

Hence sleep confirm done interrupt is sent at the end of sleep
handshake to fix the problem.

Signed-off-by: Amitkumar Karwar <***@marvell.com>
Signed-off-by: Bing Zhao <***@marvell.com>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/mwifiex/pcie.c | 28 +++++++++++-----------------
1 file changed, 11 insertions(+), 17 deletions(-)

diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c
index b159f50f7fc1..cb84edcd794b 100644
--- a/drivers/net/wireless/mwifiex/pcie.c
+++ b/drivers/net/wireless/mwifiex/pcie.c
@@ -1532,6 +1532,14 @@ static int mwifiex_pcie_process_cmd_complete(struct mwifiex_adapter *adapter)
if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
mwifiex_process_sleep_confirm_resp(adapter, skb->data,
skb->len);
+ mwifiex_pcie_enable_host_int(adapter);
+ if (mwifiex_write_reg(adapter,
+ PCIE_CPU_INT_EVENT,
+ CPU_INTR_SLEEP_CFM_DONE)) {
+ dev_warn(adapter->dev,
+ "Write register failed\n");
+ return -1;
+ }
while (reg->sleep_cookie && (count++ < 10) &&
mwifiex_pcie_ok_to_access_hw(adapter))
usleep_range(50, 60);
@@ -2000,23 +2008,9 @@ static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
adapter->int_status |= pcie_ireg;
spin_unlock_irqrestore(&adapter->int_lock, flags);

- if (pcie_ireg & HOST_INTR_CMD_DONE) {
- if ((adapter->ps_state == PS_STATE_SLEEP_CFM) ||
- (adapter->ps_state == PS_STATE_SLEEP)) {
- mwifiex_pcie_enable_host_int(adapter);
- if (mwifiex_write_reg(adapter,
- PCIE_CPU_INT_EVENT,
- CPU_INTR_SLEEP_CFM_DONE)
- ) {
- dev_warn(adapter->dev,
- "Write register failed\n");
- return;
-
- }
- }
- } else if (!adapter->pps_uapsd_mode &&
- adapter->ps_state == PS_STATE_SLEEP &&
- mwifiex_pcie_ok_to_access_hw(adapter)) {
+ if (!adapter->pps_uapsd_mode &&
+ adapter->ps_state == PS_STATE_SLEEP &&
+ mwifiex_pcie_ok_to_access_hw(adapter)) {
/* Potentially for PCIe we could get other
* interrupts like shared. Don't change power
* state until cookie is set */
--
1.9.0
Jiri Slaby
2014-03-22 10:46:53 UTC
Permalink
From: George McCollister <***@gmail.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 791c9e0292671a3bfa95286bb5c08129d8605618 upstream.

dequeue_entity() is called when p->on_rq and sets se->on_rq = 0
which appears to guarentee that the !se->on_rq condition is met.
If the task has done set_current_state(TASK_INTERRUPTIBLE) without
schedule() the second condition will be met and vruntime will be
incorrectly adjusted twice.

In certain cases this can result in the task's vruntime never increasing
past the vruntime of other tasks on the CFS' run queue, starving them of
CPU time.

This patch changes switched_from_fair() to use !p->on_rq instead of
!se->on_rq.

I'm able to cause a task with a priority of 120 to starve all other
tasks with the same priority on an ARM platform running 3.2.51-rt72
PREEMPT RT by writing one character at time to a serial tty (16550 UART)
in a tight loop. I'm also able to verify making this change corrects the
problem on that platform and kernel version.

Signed-off-by: George McCollister <***@gmail.com>
Signed-off-by: Peter Zijlstra <***@infradead.org>
Link: http://lkml.kernel.org/r/1392767811-28916-1-git-send-email-***@gmail.com
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/sched/fair.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index bbfb3dc53eb4..790e2fc808da 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6015,15 +6015,15 @@ static void switched_from_fair(struct rq *rq, struct task_struct *p)
struct cfs_rq *cfs_rq = cfs_rq_of(se);

/*
- * Ensure the task's vruntime is normalized, so that when its
+ * Ensure the task's vruntime is normalized, so that when it's
* switched back to the fair class the enqueue_entity(.flags=0) will
* do the right thing.
*
- * If it was on_rq, then the dequeue_entity(.flags=0) will already
- * have normalized the vruntime, if it was !on_rq, then only when
+ * If it's on_rq, then the dequeue_entity(.flags=0) will already
+ * have normalized the vruntime, if it's !on_rq, then only when
* the task is sleeping will it still have non-normalized vruntime.
*/
- if (!se->on_rq && p->state != TASK_RUNNING) {
+ if (!p->on_rq && p->state != TASK_RUNNING) {
/*
* Fix up our vruntime so that the current sleep doesn't
* cause 'unlimited' sleep bonus.
--
1.9.0
Jiri Slaby
2014-03-22 10:46:30 UTC
Permalink
From: Toshiaki Makita <***@lab.ntt.co.jp>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit 8d0d21f4053c07714802cbe8b1fe26913ec296cc ]

Even if we create a stacked vlan interface such as veth0.10.20, it sends
single tagged frames (tagged with only vid 10).
Because vlan_features of a veth interface has the
NETIF_F_HW_VLAN_[CTAG/STAG]_TX bits, veth0.10 also has that feature, so
dev_hard_start_xmit(veth0.10) doesn't call __vlan_put_tag() and
vlan_dev_hard_start_xmit(veth0.10) overwrites vlan_tci.
This prevents us from using a combination of 802.1ad and 802.1Q
in containers, etc.

Signed-off-by: Toshiaki Makita <***@lab.ntt.co.jp>
Acked-by: Flavio Leitner <***@redhat.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/veth.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index eee1f19ef1e9..61c4044f644e 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -269,7 +269,8 @@ static void veth_setup(struct net_device *dev)
dev->ethtool_ops = &veth_ethtool_ops;
dev->features |= NETIF_F_LLTX;
dev->features |= VETH_FEATURES;
- dev->vlan_features = dev->features;
+ dev->vlan_features = dev->features &
+ ~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX);
dev->destructor = veth_dev_free;

dev->hw_features = VETH_FEATURES;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:38 UTC
Permalink
From: Michael Chan <***@broadcom.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit d7b95315cc7f441418845a165ee56df723941487 ]

Redefine the RXD_ERR_MASK to include only relevant error bits. This fixes
a customer reported issue of randomly dropping packets on the 5719.

Signed-off-by: Michael Chan <***@broadcom.com>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/ethernet/broadcom/tg3.c | 3 +--
drivers/net/ethernet/broadcom/tg3.h | 6 +++++-
2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index c0acf98d1ea5..14a50a11d72e 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -6813,8 +6813,7 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)

work_mask |= opaque_key;

- if ((desc->err_vlan & RXD_ERR_MASK) != 0 &&
- (desc->err_vlan != RXD_ERR_ODD_NIBBLE_RCVD_MII)) {
+ if (desc->err_vlan & RXD_ERR_MASK) {
drop_it:
tg3_recycle_rx(tnapi, tpr, opaque_key,
desc_idx, *post_ptr);
diff --git a/drivers/net/ethernet/broadcom/tg3.h b/drivers/net/ethernet/broadcom/tg3.h
index 70257808aa37..ac50e7c9c2b8 100644
--- a/drivers/net/ethernet/broadcom/tg3.h
+++ b/drivers/net/ethernet/broadcom/tg3.h
@@ -2598,7 +2598,11 @@ struct tg3_rx_buffer_desc {
#define RXD_ERR_TOO_SMALL 0x00400000
#define RXD_ERR_NO_RESOURCES 0x00800000
#define RXD_ERR_HUGE_FRAME 0x01000000
-#define RXD_ERR_MASK 0xffff0000
+
+#define RXD_ERR_MASK (RXD_ERR_BAD_CRC | RXD_ERR_COLLISION | \
+ RXD_ERR_LINK_LOST | RXD_ERR_PHY_DECODE | \
+ RXD_ERR_MAC_ABRT | RXD_ERR_TOO_SMALL | \
+ RXD_ERR_NO_RESOURCES | RXD_ERR_HUGE_FRAME)

u32 reserved;
u32 opaque;
--
1.9.0
Jiri Slaby
2014-03-22 10:46:22 UTC
Permalink
From: NeilBrown <***@suse.de>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 93dc41bdc5c853916610576c6b48a1704959c70d upstream.

We have one report of a crash in xs_tcp_setup_socket.
The call path to the crash is:

xs_tcp_setup_socket -> inet_stream_connect -> lock_sock_nested.

The 'sock' passed to that last function is NULL.

The only way I can see this happening is a concurrent call to
xs_close:

xs_close -> xs_reset_transport -> sock_release -> inet_release

inet_release sets:
sock->sk = NULL;
inet_stream_connect calls
lock_sock(sock->sk);
which gets NULL.

All calls to xs_close are protected by XPRT_LOCKED as are most
activations of the workqueue which runs xs_tcp_setup_socket.
The exception is xs_tcp_schedule_linger_timeout.

So presumably the timeout queued by the later fires exactly when some
other code runs xs_close().

To protect against this we can move the cancel_delayed_work_sync()
call from xs_destory() to xs_close().

As xs_close is never called from the worker scheduled on
->connect_worker, this can never deadlock.

Signed-off-by: NeilBrown <***@suse.de>
[Trond: Make it safe to call cancel_delayed_work_sync() on AF_LOCAL sockets]
Signed-off-by: Trond Myklebust <***@netapp.com>

Signed-off-by: Jiri Slaby <***@suse.cz>
---
net/sunrpc/xprtsock.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 83a1daa642bb..1d034825fcc3 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -853,6 +853,8 @@ static void xs_close(struct rpc_xprt *xprt)

dprintk("RPC: xs_close xprt %p\n", xprt);

+ cancel_delayed_work_sync(&transport->connect_worker);
+
xs_reset_transport(transport);
xprt->reestablish_timeout = 0;

@@ -887,12 +889,8 @@ static void xs_local_destroy(struct rpc_xprt *xprt)
*/
static void xs_destroy(struct rpc_xprt *xprt)
{
- struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
-
dprintk("RPC: xs_destroy xprt %p\n", xprt);

- cancel_delayed_work_sync(&transport->connect_worker);
-
xs_local_destroy(xprt);
}

@@ -1834,6 +1832,10 @@ static inline void xs_reclassify_socket(int family, struct socket *sock)
}
#endif

+static void xs_dummy_setup_socket(struct work_struct *work)
+{
+}
+
static struct socket *xs_create_sock(struct rpc_xprt *xprt,
struct sock_xprt *transport, int family, int type, int protocol)
{
@@ -2673,6 +2675,9 @@ static struct rpc_xprt *xs_setup_local(struct xprt_create *args)
xprt->ops = &xs_local_ops;
xprt->timeout = &xs_local_default_timeout;

+ INIT_DELAYED_WORK(&transport->connect_worker,
+ xs_dummy_setup_socket);
+
switch (sun->sun_family) {
case AF_LOCAL:
if (sun->sun_path[0] != '/') {
--
1.9.0
Jiri Slaby
2014-03-22 10:46:31 UTC
Permalink
From: Fernando Luis Vazquez Cao <***@oss.ntt.co.jp>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

[ Upstream commit 6671b2240c54585d4afb5286a29f1569fe5e40a8 ]

Even though only the outer vlan tag can be HW accelerated in the transmission
path, in the TUN/TAP driver vlan_features mirrors hw_features, which happens
to have the NETIF_F_HW_VLAN_?TAG_TX flags set. Because of this, during packet
tranmisssion through a stacked vlan device dev_hard_start_xmit, (incorrectly)
assuming that the vlan device supports hardware vlan acceleration, does not
add the vlan header to the skb payload and the inner vlan tags are lost
(vlan_tci contains the outer vlan tag when userspace reads the packet from
the tap device).

Signed-off-by: Fernando Luis Vazquez Cao <***@oss.ntt.co.jp>
Signed-off-by: Toshiaki Makita <***@lab.ntt.co.jp>
Signed-off-by: David S. Miller <***@davemloft.net>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/tun.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 7c8343a4f918..10636cbd3807 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1650,7 +1650,9 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
TUN_USER_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX;
dev->features = dev->hw_features;
- dev->vlan_features = dev->features;
+ dev->vlan_features = dev->features &
+ ~(NETIF_F_HW_VLAN_CTAG_TX |
+ NETIF_F_HW_VLAN_STAG_TX);

INIT_LIST_HEAD(&tun->disabled);
err = tun_attach(tun, file, false);
--
1.9.0
Jiri Slaby
2014-03-22 10:47:12 UTC
Permalink
From: Amitkumar Karwar <***@marvell.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit c99b1861c232e1f641f13b8645e0febb3712cc71 upstream.

While preparing association request, intersection of device's HT
capability information and corresponding fields advertised by AP
is used.

This patch fixes an error while copying this field from AP's
beacon.

Signed-off-by: Amitkumar Karwar <***@marvell.com>
Signed-off-by: Bing Zhao <***@marvell.com>
Signed-off-by: John W. Linville <***@tuxdriver.com>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
drivers/net/wireless/mwifiex/11n.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mwifiex/11n.c b/drivers/net/wireless/mwifiex/11n.c
index 0b803c05cab3..983c10c49658 100644
--- a/drivers/net/wireless/mwifiex/11n.c
+++ b/drivers/net/wireless/mwifiex/11n.c
@@ -308,8 +308,7 @@ mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
ht_cap->header.len =
cpu_to_le16(sizeof(struct ieee80211_ht_cap));
memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
- (u8 *) bss_desc->bcn_ht_cap +
- sizeof(struct ieee_types_header),
+ (u8 *)bss_desc->bcn_ht_cap,
le16_to_cpu(ht_cap->header.len));

mwifiex_fill_cap_info(priv, radio_type, ht_cap);
--
1.9.0
Jiri Slaby
2014-03-22 10:46:26 UTC
Permalink
From: Jason Baron <***@akamai.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 4ff36ee94d93ddb4b7846177f1118d9aa33408e2 upstream.

The EPOLL_CTL_DEL path of epoll contains a classic, ab-ba deadlock.
That is, epoll_ctl(a, EPOLL_CTL_DEL, b, x), will deadlock with
epoll_ctl(b, EPOLL_CTL_DEL, a, x). The deadlock was introduced with
commmit 67347fe4e632 ("epoll: do not take global 'epmutex' for simple
topologies").

The acquistion of the ep->mtx for the destination 'ep' was added such
that a concurrent EPOLL_CTL_ADD operation would see the correct state of
the ep (Specifically, the check for '!list_empty(&f.file->f_ep_links')

However, by simply not acquiring the lock, we do not serialize behind
the ep->mtx from the add path, and thus may perform a full path check
when if we had waited a little longer it may not have been necessary.
However, this is a transient state, and performing the full loop
checking in this case is not harmful.

The important point is that we wouldn't miss doing the full loop
checking when required, since EPOLL_CTL_ADD always locks any 'ep's that
its operating upon. The reason we don't need to do lock ordering in the
add path, is that we are already are holding the global 'epmutex'
whenever we do the double lock. Further, the original posting of this
patch, which was tested for the intended performance gains, did not
perform this additional locking.

Signed-off-by: Jason Baron <***@akamai.com>
Cc: Nathan Zimmer <***@sgi.com>
Cc: Eric Wong <***@yhbt.net>
Cc: Nelson Elhage <***@nelhage.com>
Cc: Al Viro <***@zeniv.linux.org.uk>
Cc: Davide Libenzi <***@xmailserver.org>
Cc: "Paul E. McKenney" <***@us.ibm.com>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/eventpoll.c | 4 ----
1 file changed, 4 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index f7fe7e3ce664..d76c9744c774 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1908,10 +1908,6 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
}
}
}
- if (op == EPOLL_CTL_DEL && is_file_epoll(tf.file)) {
- tep = tf.file->private_data;
- mutex_lock_nested(&tep->mtx, 1);
- }

/*
* Try to lookup the file inside our RB tree, Since we grabbed "mtx"
--
1.9.0
Jiri Slaby
2014-03-22 10:46:24 UTC
Permalink
From: Jason Baron <***@akamai.com>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ae10b2b4eb01bedc91d29d5c5bb9e416fd806c40 upstream.

Nathan Zimmer found that once we get over 10+ cpus, the scalability of
SPECjbb falls over due to the contention on the global 'epmutex', which is
taken in on EPOLL_CTL_ADD and EPOLL_CTL_DEL operations.

Patch #1 removes the 'epmutex' lock completely from the EPOLL_CTL_DEL path
by using rcu to guard against any concurrent traversals.

Patch #2 remove the 'epmutex' lock from EPOLL_CTL_ADD operations for
simple topologies. IE when adding a link from an epoll file descriptor to
a wakeup source, where the epoll file descriptor is not nested.

This patch (of 2):

Optimize EPOLL_CTL_DEL such that it does not require the 'epmutex' by
converting the file->f_ep_links list into an rcu one. In this way, we can
traverse the epoll network on the add path in parallel with deletes.
Since deletes can't create loops or worse wakeup paths, this is safe.

This patch in combination with the patch "epoll: Do not take global 'epmutex'
for simple topologies", shows a dramatic performance improvement in
scalability for SPECjbb.

Signed-off-by: Jason Baron <***@akamai.com>
Tested-by: Nathan Zimmer <***@sgi.com>
Cc: Eric Wong <***@yhbt.net>
Cc: Nelson Elhage <***@nelhage.com>
Cc: Al Viro <***@zeniv.linux.org.uk>
Cc: Davide Libenzi <***@xmailserver.org>
Cc: "Paul E. McKenney" <***@us.ibm.com>
CC: Wu Fengguang <***@intel.com>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
Signed-off-by: Linus Torvalds <***@linux-foundation.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
fs/eventpoll.c | 56 ++++++++++++++++++++++++++++++++------------------------
1 file changed, 32 insertions(+), 24 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 810c28fb8c3c..584249454822 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -41,6 +41,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/compat.h>
+#include <linux/rculist.h>

/*
* LOCKING:
@@ -133,8 +134,12 @@ struct nested_calls {
* of these on a server and we do not want this to take another cache line.
*/
struct epitem {
- /* RB tree node used to link this structure to the eventpoll RB tree */
- struct rb_node rbn;
+ union {
+ /* RB tree node links this structure to the eventpoll RB tree */
+ struct rb_node rbn;
+ /* Used to free the struct epitem */
+ struct rcu_head rcu;
+ };

/* List header used to link this structure to the eventpoll ready list */
struct list_head rdllink;
@@ -671,6 +676,12 @@ static int ep_scan_ready_list(struct eventpoll *ep,
return error;
}

+static void epi_rcu_free(struct rcu_head *head)
+{
+ struct epitem *epi = container_of(head, struct epitem, rcu);
+ kmem_cache_free(epi_cache, epi);
+}
+
/*
* Removes a "struct epitem" from the eventpoll RB tree and deallocates
* all the associated resources. Must be called with "mtx" held.
@@ -692,8 +703,7 @@ static int ep_remove(struct eventpoll *ep, struct epitem *epi)

/* Remove the current item from the list of epoll hooks */
spin_lock(&file->f_lock);
- if (ep_is_linked(&epi->fllink))
- list_del_init(&epi->fllink);
+ list_del_rcu(&epi->fllink);
spin_unlock(&file->f_lock);

rb_erase(&epi->rbn, &ep->rbr);
@@ -704,9 +714,14 @@ static int ep_remove(struct eventpoll *ep, struct epitem *epi)
spin_unlock_irqrestore(&ep->lock, flags);

wakeup_source_unregister(ep_wakeup_source(epi));
-
- /* At this point it is safe to free the eventpoll item */
- kmem_cache_free(epi_cache, epi);
+ /*
+ * At this point it is safe to free the eventpoll item. Use the union
+ * field epi->rcu, since we are trying to minimize the size of
+ * 'struct epitem'. The 'rbn' field is no longer in use. Protected by
+ * ep->mtx. The rcu read side, reverse_path_check_proc(), does not make
+ * use of the rbn field.
+ */
+ call_rcu(&epi->rcu, epi_rcu_free);

atomic_long_dec(&ep->user->epoll_watches);

@@ -872,7 +887,6 @@ static const struct file_operations eventpoll_fops = {
*/
void eventpoll_release_file(struct file *file)
{
- struct list_head *lsthead = &file->f_ep_links;
struct eventpoll *ep;
struct epitem *epi;

@@ -890,17 +904,12 @@ void eventpoll_release_file(struct file *file)
* Besides, ep_remove() acquires the lock, so we can't hold it here.
*/
mutex_lock(&epmutex);
-
- while (!list_empty(lsthead)) {
- epi = list_first_entry(lsthead, struct epitem, fllink);
-
+ list_for_each_entry_rcu(epi, &file->f_ep_links, fllink) {
ep = epi->ep;
- list_del_init(&epi->fllink);
mutex_lock_nested(&ep->mtx, 0);
ep_remove(ep, epi);
mutex_unlock(&ep->mtx);
}
-
mutex_unlock(&epmutex);
}

@@ -1138,7 +1147,9 @@ static int reverse_path_check_proc(void *priv, void *cookie, int call_nests)
struct file *child_file;
struct epitem *epi;

- list_for_each_entry(epi, &file->f_ep_links, fllink) {
+ /* CTL_DEL can remove links here, but that can't increase our count */
+ rcu_read_lock();
+ list_for_each_entry_rcu(epi, &file->f_ep_links, fllink) {
child_file = epi->ep->file;
if (is_file_epoll(child_file)) {
if (list_empty(&child_file->f_ep_links)) {
@@ -1160,6 +1171,7 @@ static int reverse_path_check_proc(void *priv, void *cookie, int call_nests)
"file is not an ep!\n");
}
}
+ rcu_read_unlock();
return error;
}

@@ -1286,7 +1298,7 @@ static int ep_insert(struct eventpoll *ep, struct epoll_event *event,

/* Add the current item to the list of active epoll hook for this file */
spin_lock(&tfile->f_lock);
- list_add_tail(&epi->fllink, &tfile->f_ep_links);
+ list_add_tail_rcu(&epi->fllink, &tfile->f_ep_links);
spin_unlock(&tfile->f_lock);

/*
@@ -1327,8 +1339,7 @@ static int ep_insert(struct eventpoll *ep, struct epoll_event *event,

error_remove_epi:
spin_lock(&tfile->f_lock);
- if (ep_is_linked(&epi->fllink))
- list_del_init(&epi->fllink);
+ list_del_rcu(&epi->fllink);
spin_unlock(&tfile->f_lock);

rb_erase(&epi->rbn, &ep->rbr);
@@ -1844,15 +1855,12 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
* and hang them on the tfile_check_list, so we can check that we
* haven't created too many possible wakeup paths.
*
- * We need to hold the epmutex across both ep_insert and ep_remove
- * b/c we want to make sure we are looking at a coherent view of
- * epoll network.
+ * We need to hold the epmutex across ep_insert to prevent
+ * multple adds from creating loops in parallel.
*/
- if (op == EPOLL_CTL_ADD || op == EPOLL_CTL_DEL) {
+ if (op == EPOLL_CTL_ADD) {
mutex_lock(&epmutex);
did_lock_epmutex = 1;
- }
- if (op == EPOLL_CTL_ADD) {
if (is_file_epoll(tf.file)) {
error = -ELOOP;
if (ep_loop_check(ep, tf.file) != 0) {
--
1.9.0
Jiri Slaby
2014-03-22 10:46:20 UTC
Permalink
From: Peter Zijlstra <***@infradead.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit 7c3f2ab7b844f1a859afbc3d41925e8a0faba5fa upstream.

While discussing the proposed SCHED_DEADLINE patches which in parts
mimic the existing FIFO code it was noticed that the wmb in
rt_set_overloaded() didn't have a matching barrier.

The only site using rt_overloaded() to test the rto_count is
pull_rt_task() and we should issue a matching rmb before then assuming
there's an rto_mask bit set.

Without that smp_rmb() in there we could actually miss seeing the
rto_mask bit.

Also, change to using smp_[wr]mb(), even though this is SMP only code;
memory barriers without smp_ always make me think they're against
hardware of some sort.

Signed-off-by: Peter Zijlstra <***@infradead.org>
Cc: ***@linaro.org
Cc: ***@unitn.it
Cc: ***@windriver.com
Cc: ***@gmail.com
Cc: ***@goodmis.org
Cc: ***@gmail.com
Cc: ***@redhat.com
Cc: ***@gmail.com
Cc: ***@dvhart.com
Cc: ***@ericsson.com
Cc: ***@akatech.ch
Cc: ***@linux.vnet.ibm.com
Cc: ***@linux.it
Cc: ***@evidence.eu.com
Cc: ***@gmail.com
Cc: ***@amarulasolutions.com
Cc: ***@windriver.com
Cc: ***@gmail.com
Cc: ***@redhat.com
Cc: ***@sssup.it
Cc: Juri Lelli <***@gmail.com>
Cc: ***@ericsson.com
Cc: ***@disi.unitn.it
Cc: ***@linutronix.de
Link: http://lkml.kernel.org/r/***@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <***@kernel.org>
Signed-off-by: Jiri Slaby <***@suse.cz>
---
kernel/sched/rt.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 417b1b3fd7e9..0c7886ff263e 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -246,8 +246,10 @@ static inline void rt_set_overload(struct rq *rq)
* if we should look at the mask. It would be a shame
* if we looked at the mask, but the mask was not
* updated yet.
+ *
+ * Matched by the barrier in pull_rt_task().
*/
- wmb();
+ smp_wmb();
atomic_inc(&rq->rd->rto_count);
}

@@ -1644,6 +1646,12 @@ static int pull_rt_task(struct rq *this_rq)
if (likely(!rt_overloaded(this_rq)))
return 0;

+ /*
+ * Match the barrier from rt_set_overloaded; this guarantees that if we
+ * see overloaded we must also see the rto_mask bit.
+ */
+ smp_rmb();
+
for_each_cpu(cpu, this_rq->rd->rto_mask) {
if (this_cpu == cpu)
continue;
--
1.9.0
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