Commit Graph

387732 Commits

Author SHA1 Message Date
Adrian Knoth b43dd416be ALSA: hdspm - Fix SNDRV_HDSPM_IOCTL_GET_LTC
Use struct hdspm_ltc to query the LTC, using a mixer struct is just
plain wrong.

Due to the wrong struct, this ioctl was never working, so we're free to
fix it without breaking userspace compatibility.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-19 20:09:09 +02:00
Adrian Knoth 1568b88022 ALSA: hdspm - Use enums in hdspm_tco_ltc_frames()
This patch doesn't change functionality, it only improves readability
and fixes a copy&paste error in a comment.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-19 20:09:03 +02:00
Adrian Knoth 17d2f00836 ALSA: hdspm - Fix default value in SNDRV_HDSPM_IOCTL_GET_LTC
Use enum hdspm_ltc_format's fps_30 (corresponds to 4) instead of 30,
Other case branches return 1, 2 or 3 respectively, so 30 obviously is
wrong.

Since SNDRV_HDSPM_IOCTL_GET_LTC had never been working due to a
copy&paste error in hdspm.h, this change doesn't break userspace.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-19 20:08:57 +02:00
Tim Gardner 74d779ab7c ALSA: pcm: Use snd_printd_ratelimit()
The use of snd_printd_ratelimit() supresses superfluous output from
printk_ratelimit() when CONFIG_SND_DEBUG is not defined. For example,

[   43.753692] snd_pcm_update_hw_ptr0: 26 callbacks suppressed
[   48.822131] snd_pcm_update_hw_ptr0: 25 callbacks suppressed
[   53.894953] snd_pcm_update_hw_ptr0: 25 callbacks suppressed
[   58.997761] snd_pcm_update_hw_ptr0: 25 callbacks suppressed
[   64.100952] snd_pcm_update_hw_ptr0: 25 callbacks suppressed

fills the log even when no debug output is actually produced.

Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Yacine Belkadi <yacine.belkadi.1@gmail.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-19 15:48:48 +02:00
Tim Gardner bcbb15530e ALSA: pcm: Add snd_printd_ratelimit()
Direct calls to printk_limit() will emit log noise even when CONFIG_SND_DEBUG is not
defined. Add a wrapper macro around printk_limit() that is conditionally defined by
CONFIG_SND_DEBUG.

Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Yacine Belkadi <yacine.belkadi.1@gmail.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-19 15:48:33 +02:00
David Henningsson c841ad2a9b ALSA: hda - Try to allow haswell HDMI audio even without powerwell
If compiled without CONFIG_SND_HDA_I915, the audio driver cannot
request power well. However, if the power well is on for other
reasons, maybe audio can still work. Therefore, do not skip the
card completely if compiled without CONFIG_SND_HDA_I915.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-19 15:46:17 +02:00
David Henningsson cd5302c0d4 ALSA: hda - Limit internal mic boost for a few more Thinkpad machines
The higher mic boosts (on internal mic) are so noisy they're unusable
in practice.

BugLink: https://bugs.launchpad.net/bugs/1213820
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-19 15:45:51 +02:00
David Henningsson aaedfb4761 ALSA: hda - Fix the order of a quirk table (janitorial)
This just cleans up the table, no functional changes.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-16 14:50:00 +02:00
David Henningsson a4a9e08267 ALSA: hda - Fix internal mic boost on three Thinkpad machines
The internal mic boost is so noisy on boosts 2 and 3 so they are
unusable in practice.

BugLink: https://bugs.launchpad.net/bugs/1213055
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-16 14:49:50 +02:00
Knut Petersen b892ca1c9f ALSA: rme96: Add pcm stream synchronization
The hardware does support synchronized start/pause/stop of pcm streams,
so there is no reason not to add that feature after more than ten years.

Some minor coding style / white space fixes in the surroundings of the
changes.

Signed-off-by: Knut Petersen <Knut_Petersen@t-online.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-14 17:02:36 +02:00
Takashi Iwai e80c60f3cb ALSA: hda - Mute the right widget in auto_mute_via_amp mode
The current generic parser code assumes that always a pin widget
controls the mute for an output blindly although it might be a
different widget in the middle.  Instead of the fixed assumption,
check each parsed path and just pick up the right widget that has been
already defined as a mute control.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-13 09:11:04 +02:00
Takashi Iwai bc2eee29fc ALSA: hda - Allow auto_mute_via_amp on bind mute controls
The auto-mute using the amp currently works only for a single amp on a
pin.  Make it working also with HDA_CTL_BIND_MUTE type, too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-13 09:10:37 +02:00
Vinod Koul f672f31ab5 ALSA: compress: update the MAINTAINER entry
add missing uapi/ headers and Documentation files

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-12 11:43:23 +02:00
Mark Brown 33bbe1499c ALSA: Add MAINTAINERS entry for compressed audio API
Help ensure that Vinod gets included in review of compressed audio
patches by adding a MAINTAINERS entry for it.

Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-10 19:37:37 +02:00
Dan Carpenter f5cb0be917 sound: oss/dmabuf: remove an unneeded temporary variable
We don't actually use the "go" variable so it can be removed.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-09 12:38:33 +02:00
Andy Shevchenko 663819fb7d ALSA: don't push static constants on stack for %*ph
There is no need to pass constants via stack. The width may be explicitly
specified in the format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-08 12:04:18 +02:00
Eldad Zack e7e58df8ef ALSA: usb-audio: WARN_ON when alts is passed as NULL
Prevent NULL dereference in snd_usb_add_endpoints(), when
alts is passed as NULL. In this case, WARN (since this is
a non-fatal bug) and return NULL ep. Call sites treat a NULL
return value as an error.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06 10:52:27 +02:00
Eldad Zack 88abb8eff4 ALSA: usb-audio: remove implicit_fb from quirk
Since the quirks all apply to implicit feedback (the source endpoint
is always a data endpoint), there's no need to set and check
a flag for it.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06 10:52:14 +02:00
Eldad Zack 914273c714 ALSA: usb-audio: remove is_playback from implicit feedback quirks
An implicit feedback endpoint can only be a capture source. The
consumer (sink) of the implicit feedback endpoint is therefore limited
to playback EPs.
Check if the target endpoint is a playback first and remove redundant
checks.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06 10:51:48 +02:00
Eldad Zack 95fec88332 ALSA: usb-audio: do not initialize and check implicit_fb
Since implicit_fb is not changed, !implicit_fb will always
be true - it is set only after these checks.
Similarly, there's also no need to set it at the top of the function.

Change the type of implicit_fb to bool (more appropriate).

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06 10:51:11 +02:00
Eldad Zack f34d065013 ALSA: usb-audio: reverse condition logic in set_sync_endpoint
Reverse logic on the conditions required to qualify for a sync endpoint
and remove one level of indendation.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06 10:50:15 +02:00
Eldad Zack a60945fd08 ALSA: usb-audio: move implicit fb quirks to separate function
Separate setting implicit feedback quirks from setting
a sync endpoint (which may also be explicit feedback or async).

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06 10:49:21 +02:00
Eldad Zack 71bb64c56d ALSA: usb-audio: separate sync endpoint setting from set_format
Setting the sync endpoint currently takes up about half of set_format().
Move it to a dedicated function.
No functional change.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06 10:48:34 +02:00
Eldad Zack d133f2c22e ALSA: usb-audio: remove assignment from if condition
Following general kernel style.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06 10:48:22 +02:00
Eldad Zack d833cdb10c ALSA: usb-audio: remove disabled debug code in set_format
Code block does not compile when enabled.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-06 10:48:12 +02:00
Chih-Chung Chang bde7bc6014 ALSA: hda - Fix jack gating when auto_{mute,mic} is suppressed.
The snd_hda_jack_set_gating_jack() call didn't work when
auto_{mute,mic} is suppressed because (1) am_entry is
not filled with nid of the mic pin. (2) The jacks are not
created (by snd_hda_jack_detect_enable_callback) before the
snd_hda_jack_set_gating_jack call.

Now we use the first input pin nid directly, and create the jack if it
doesn't exist yet.

Signed-off-by: Chih-Chung Chang <chihchung@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-05 11:19:59 +02:00
Takashi Iwai da96fb5b01 ALSA: hda - Fix invalid multi-io creation on VAIO-Z laptops
VAIO-Z laptops need to use the specific DAC for the speaker output
by some unknown reason although the codec itself supports the flexible
connection.  So we implemented a workaround by a new flag,
no_primary_hp, for assigning the speaker pin first.

This worked until 3.8 kernel, but it got broken because the driver
learned for a better multi-io pin mapping, and not it can assign two
mic pins for multi-io.  Since the multi-io requires to be the primary
output, the hp and two mic pins are assigned in prior to the speaker
in the end.

Although the machine has two mic pins, one of them is used as a noise-
canceling headphone, thus it's no real retaskable mic jack.  Thus, at
best, we can disable the multi-io assignment and make the parser
behavior back to the state before the multi-io.

This patch adds again a new flag, no_multi_io, to indicate that the
device has no multi-io capability, and set it in the fixup for
VAIO-Z.  The no_multi_io flag itself can be used generically, added
via a helper line, too.

Reported-by: Tormen <my.nl.abos@gmail.com>
Reported-by: Adam Williamson <awilliam@redhat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-29 16:54:36 +02:00
Takashi Iwai eefb8be4a4 ALSA: hda - Remove analog mic pin override from STAC9228 dell-bios quirk
The current fixup for dell-bios model with STAC9228 codec contains the
override of pin 0x0c for analog mic.  But this is actually just adding
a bogus pin and confuses the parser.  Better to remove it for the
auto-mic switching.

Meanwhile, for a possible regression, keep the old configuration as
model=dell-bios-amic, so that people can test it again quickly.

Tested on Dell 1420n laptop.

Reported-and-tested-by: Eric Shattow <lucent@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-29 16:30:21 +02:00
Wang Xingchao 7d4f606c50 ALSA: hda - WAKEEN feature enabling for runtime pm
With runtime power save feature enabled, Headphone hotplug
event will not be detected while controller/codec in D3. HDA has
feature WAKEEN to let codec wake up system if controller is in D3 or
system in S3.(HDA Spec 4.5.9.2/3). Codec can send out INT or wake up
controller depending on whether CIE or GIE enabled.(Figure 4, Interupt
structure).

The controller must be in RESET mode after enter runtime-suspend, otherwise
it will not be waken up even if codec send out wake-up event. And STATESTS
will be cleared after controller brought out of RESET mode.

This patch only enable WAKEEN for runtime-suspend(Controller D3) mode,
not for system S3 mode. with tool "evtest", Headphone hotplug events
could be cought and reported successfully.

[fixed an unused variable warning by tiwai]

Signed-off-by: Wang Xingchao <xingchao.wang@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-29 14:33:20 +02:00
Wang Xingchao 18e6062756 ALSA: hda - jack poll once if jackpoll_interval==0
With jackpoll_interval != 0, it's used to poll jack event periodically
in a delayed work. if it's 0, give the caller chance to probe jack status
but will not restart the delayed work.

In the next patch which enable WAKEEN feature, HDA controller was able to wake
up system when it's in D3, it's useful to detect Jack hotplug event and notify
userspace. By default the jackpoll_interval=0, this patch let jack poll once
without starting the delayed work.

Signed-off-by: Wang Xingchao <xingchao.wang@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-29 14:19:10 +02:00
Wang Xingchao 7eaa9161ed ALSA: hda - Clearing jackpoll_interval avoid pending work
Clearing jackpoll_interval before calling cancel_delayed_work_sync(),
otherwise the work will be triggered again and cause impact in
hda_jackpoll_work(). The next patch will poll jack once even with
jackpoll_interval=0.

Signed-off-by: Wang Xingchao <xingchao.wang@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-29 14:19:03 +02:00
Dan Carpenter 85054b2153 ALSA: usx2y: remove an unneeded check
The test here is always true because S[i].urb is an array not a pointer.
Also it's bogus because the intent was to test:
	if (S->urb[i]) {
instead of:
	if (S[i].urb) {

Anyway, usb_kill_urb() and usb_free_urb() accept NULL pointers so we can
just remove this.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-29 13:59:47 +02:00
Wang Xingchao da7db6ad4d ALSA: hda - use azx_writew() for 16-bit length register
Register STATESTS is 16-bit length, use correct API for read/write.

Signed-off-by: Wang Xingchao <xingchao.wang@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-24 15:59:32 +02:00
Kailang Yang c5177c861e ALSA: hda - Fix the noise after suspend on ALC283 codec
When the power state of ALC283 codec goes to D3, it gives a noise via
headphone output.  This is because the driver tries to clear all pins
via snd_hda_shutup_pins().  Setting the mic pin to zero triggers such
a noise.

Define a new shutup call specific to this codec and control the pins
there more precisely.  Also, add the power-save enable/disable
sequences in the resume and the new shutup calls.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-24 14:44:40 +02:00
Takashi Iwai 9bfb2844a2 ALSA: hda/realtek - Selectively call snd_hda_shutup_pins()
Instead of calling snd_hda_shutup_pins() unconditionally, allow it be
called in spec->shutup callback.  In this way, we can avoid calling
this function if it causes a problem like we see in the next patch
following this.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-24 14:31:50 +02:00
Jingoo Han b785a492c6 ALSA: replace strict_strto*() with kstrto*()
The usage of strict_strto*() is not preferred, because
strict_strto*() is obsolete. Thus, kstrto*() should be
used.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-21 11:56:18 +02:00
Takashi Iwai 60ea8ca21b ALSA: hda - Add snd_hda_jack_detect_state() helper function
snd_hda_jack_detect() function returns a boolean value for a jack
plugged in or not, but it also returns always true when the
corresponding pin is phantom (i.e. fixed).  This is OK in most cases,
but it makes the generic parser misbehaving about the auto-mute or
auto-mic switching, e.g. when one of headphone pins is a fixed.
Namely, the driver decides whether to mute the speaker or not, just
depending on the headphone plug state: if one of the headphone jacks
is seen as active, then the speaker is muted.  Thus this will result
always in the muted speaker output.

So, the problem is the function returns a boolean, after all, although
we need to think of "phantom" jack.  Now a new function,
snd_hda_jack_detect_state() is introduced to return these tristates.
The generic parser uses this function for checking the headphone or
mic jack states.

Meanwhile, the behavior of snd_hda_jack_detect() is kept as is, for
keeping compatibility in other driver codes.

Acked-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-21 11:52:54 +02:00
David Henningsson e4c3bce26d ALSA: hda - Headphone mic support for an Asus/Conexant device
This Conexant codec has a single jack that can be used as either
headphone or mic (but not headset). The existing hp_mic functionality
does not apply here, because the mic and the HP are on separate pins.

Hence make a lighter version of what has been earlier done for Realtek
codecs.

BugLink: https://bugs.launchpad.net/bugs/1198030
Tested-by: Franz Hsieh <franz.hsieh@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-16 11:57:37 +02:00
Fengguang Wu 68593c9340 ALSA: hdspm - remove unneeded semicolon
sound/pci/rme9652/hdspm.c:1110:2-3: Unneeded semicolon

Generated by: coccinelle/misc/semicolon.cocci

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-07-15 15:46:13 +02:00
Takashi Iwai a067c035a0 Merge branch 'for-3.12' into for-next 2013-07-15 12:09:28 +02:00
Linus Torvalds ad81f0545e Linux 3.11-rc1 2013-07-14 15:18:27 -07:00
Linus Torvalds 54be820019 Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
Pull slab update from Pekka Enberg:
 "Highlights:

  - Fix for boot-time problems on some architectures due to
    init_lock_keys() not respecting kmalloc_caches boundaries
    (Christoph Lameter)

  - CONFIG_SLUB_CPU_PARTIAL requested by RT folks (Joonsoo Kim)

  - Fix for excessive slab freelist draining (Wanpeng Li)

  - SLUB and SLOB cleanups and fixes (various people)"

I ended up editing the branch, and this avoids two commits at the end
that were immediately reverted, and I instead just applied the oneliner
fix in between myself.

* 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
  slub: Check for page NULL before doing the node_match check
  mm/slab: Give s_next and s_stop slab-specific names
  slob: Check for NULL pointer before calling ctor()
  slub: Make cpu partial slab support configurable
  slab: add kmalloc() to kernel API documentation
  slab: fix init_lock_keys
  slob: use DIV_ROUND_UP where possible
  slub: do not put a slab to cpu partial list when cpu_partial is 0
  mm/slub: Use node_nr_slabs and node_nr_objs in get_slabinfo
  mm/slub: Drop unnecessary nr_partials
  mm/slab: Fix /proc/slabinfo unwriteable for slab
  mm/slab: Sharing s_next and s_stop between slab and slub
  mm/slab: Fix drain freelist excessively
  slob: Rework #ifdeffery in slab.h
  mm, slab: moved kmem_cache_alloc_node comment to correct place
2013-07-14 15:14:29 -07:00
Steven Rostedt c25f195e82 slub: Check for page NULL before doing the node_match check
In the -rt kernel (mrg), we hit the following dump:

BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffff811573f1>] kmem_cache_alloc_node+0x51/0x180
PGD a2d39067 PUD b1641067 PMD 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: sunrpc cpufreq_ondemand ipv6 tg3 joydev sg serio_raw pcspkr k8temp amd64_edac_mod edac_core i2c_piix4 e100 mii shpchp ext4 mbcache jbd2 sd_mod crc_t10dif sr_mod cdrom sata_svw ata_generic pata_acpi pata_serverworks radeon ttm drm_kms_helper drm hwmon i2c_algo_bit i2c_core dm_mirror dm_region_hash dm_log dm_mod
CPU 3
Pid: 20878, comm: hackbench Not tainted 3.6.11-rt25.14.el6rt.x86_64 #1 empty empty/Tyan Transport GT24-B3992
RIP: 0010:[<ffffffff811573f1>]  [<ffffffff811573f1>] kmem_cache_alloc_node+0x51/0x180
RSP: 0018:ffff8800a9b17d70  EFLAGS: 00010213
RAX: 0000000000000000 RBX: 0000000001200011 RCX: ffff8800a06d8000
RDX: 0000000004d92a03 RSI: 00000000000000d0 RDI: ffff88013b805500
RBP: ffff8800a9b17dc0 R08: ffff88023fd14d10 R09: ffffffff81041cbd
R10: 00007f4e3f06e9d0 R11: 0000000000000246 R12: ffff88013b805500
R13: ffff8801ff46af40 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f4e3f06e700(0000) GS:ffff88023fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 00000000a2d3a000 CR4: 00000000000007e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process hackbench (pid: 20878, threadinfo ffff8800a9b16000, task ffff8800a06d8000)
Stack:
 ffff8800a9b17da0 ffffffff81202e08 ffff8800a9b17de0 000000d001200011
 0000000001200011 0000000001200011 0000000000000000 0000000000000000
 00007f4e3f06e9d0 0000000000000000 ffff8800a9b17e60 ffffffff81041cbd
Call Trace:
 [<ffffffff81202e08>] ? current_has_perm+0x68/0x80
 [<ffffffff81041cbd>] copy_process+0xdd/0x15b0
 [<ffffffff810a2125>] ? rt_up_read+0x25/0x30
 [<ffffffff8104369a>] do_fork+0x5a/0x360
 [<ffffffff8107c66b>] ? migrate_enable+0xeb/0x220
 [<ffffffff8100b068>] sys_clone+0x28/0x30
 [<ffffffff81527423>] stub_clone+0x13/0x20
 [<ffffffff81527152>] ? system_call_fastpath+0x16/0x1b
Code: 89 fc 89 75 cc 41 89 d6 4d 8b 04 24 65 4c 03 04 25 48 ae 00 00 49 8b 50 08 4d 8b 28 49 8b 40 10 4d 85 ed 74 12 41 83 fe ff 74 27 <48> 8b 00 48 c1 e8 3a 41 39 c6 74 1b 8b 75 cc 4c 89 c9 44 89 f2
RIP  [<ffffffff811573f1>] kmem_cache_alloc_node+0x51/0x180
 RSP <ffff8800a9b17d70>
CR2: 0000000000000000
---[ end trace 0000000000000002 ]---

Now, this uses SLUB pretty much unmodified, but as it is the -rt kernel
with CONFIG_PREEMPT_RT set, spinlocks are mutexes, although they do
disable migration. But the SLUB code is relatively lockless, and the
spin_locks there are raw_spin_locks (not converted to mutexes), thus I
believe this bug can happen in mainline without -rt features. The -rt
patch is just good at triggering mainline bugs ;-)

Anyway, looking at where this crashed, it seems that the page variable
can be NULL when passed to the node_match() function (which does not
check if it is NULL). When this happens we get the above panic.

As page is only used in slab_alloc() to check if the node matches, if
it's NULL I'm assuming that we can say it doesn't and call the
__slab_alloc() code. Is this a correct assumption?

Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-14 15:13:16 -07:00
Linus Torvalds 41d9884c44 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs stuff from Al Viro:
 "O_TMPFILE ABI changes, Oleg's fput() series, misc cleanups, including
  making simple_lookup() usable for filesystems with non-NULL s_d_op,
  which allows us to get rid of quite a bit of ugliness"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  sunrpc: now we can just set ->s_d_op
  cgroup: we can use simple_lookup() now
  efivarfs: we can use simple_lookup() now
  make simple_lookup() usable for filesystems that set ->s_d_op
  configfs: don't open-code d_alloc_name()
  __rpc_lookup_create_exclusive: pass string instead of qstr
  rpc_create_*_dir: don't bother with qstr
  llist: llist_add() can use llist_add_batch()
  llist: fix/simplify llist_add() and llist_add_batch()
  fput: turn "list_head delayed_fput_list" into llist_head
  fs/file_table.c:fput(): add comment
  Safer ABI for O_TMPFILE
2013-07-14 11:42:26 -07:00
Al Viro dae3794fd6 sunrpc: now we can just set ->s_d_op
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-07-14 17:55:39 +04:00
Al Viro 786e1448d9 cgroup: we can use simple_lookup() now
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-07-14 17:50:23 +04:00
Al Viro 6e8cd2cb46 efivarfs: we can use simple_lookup() now
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-07-14 17:48:35 +04:00
Al Viro 74931da7a6 make simple_lookup() usable for filesystems that set ->s_d_op
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-07-14 17:43:25 +04:00
Al Viro ec193cf5af configfs: don't open-code d_alloc_name()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-07-14 17:16:52 +04:00
Al Viro d3db90b0a4 __rpc_lookup_create_exclusive: pass string instead of qstr
... and use d_hash_and_lookup() instead of open-coding it, for fsck sake...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-07-14 17:09:57 +04:00