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Takashi Iwai 76f87b11a4 ALSA: core: Add async signal helpers 
[ Upstream commit ef34a0ae7a2654bc9e58675e36898217fb2799d8 ]

Currently the call of kill_fasync() from an interrupt handler might
lead to potential spin deadlocks, as spotted by syzkaller.
Unfortunately, it's not so trivial to fix this lock chain as it's
involved with the tasklist_lock that is touched in allover places.

As a temporary workaround, this patch provides the way to defer the
async signal notification in a work.  The new helper functions,
snd_fasync_helper() and snd_kill_faync() are replacements for
fasync_helper() and kill_fasync(), respectively.  In addition,
snd_fasync_free() needs to be called at the destructor of the relevant
file object.

Link: https://lore.kernel.org/r/20220728125945.29533-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-08-25 11:18:37 +02:00
..
ac97
ASoC: ac97: convert to SPDX identifiers
2018-07-02 10:56:09 +01:00
sof
Merge branch 'asoc-5.4' into asoc-next
2019-09-09 14:55:20 +01:00
ac97_codec.h
ASoC: ac97: convert to SPDX identifiers
2018-07-02 10:56:09 +01:00
aci.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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adau1373.h
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aess.h
ASoC: TI AESS: add autogating-enable function, callable from architecture code
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ak4xxx-adda.h
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ak4641.h
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2019-06-19 17:09:55 +02:00
alc5623.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
asequencer.h
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2019-05-30 11:26:35 -07:00
asound.h
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asoundef.h
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compress_driver.h
ALSA: compress: fix partial_drain completion state
2020-07-16 08:16:39 +02:00
control.h
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2019-05-30 11:26:35 -07:00
core.h
ALSA: core: Add async signal helpers
2022-08-25 11:18:37 +02:00
cs35l33.h
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cs35l35.h
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cs35l36.h
ASoC: cs35l36: Add support for Cirrus CS35L36 Amplifier
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designware_i2s.h
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dmaengine_pcm.h
ASoC: dmaengine: Remove unused SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME flag
2019-02-14 16:17:35 +00:00
emu10k1_synth.h
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gus.h
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hda_chmap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hda_codec.h
ALSA: hda: fix jack detection with Realtek codecs when in D3
2020-10-29 09:57:25 +01:00
hda_component.h
i915/snd_hdac: I915 subcomponent for the snd_hdac
2019-02-08 16:58:59 +01:00
hda_hwdep.h
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2019-05-24 17:27:10 +02:00
hda_i915.h
ALSA: hda: Make audio component support more generic
2018-07-17 22:25:48 +02:00
hda_register.h
ALSA: hdac: clear link output stream mapping
2019-10-07 03:58:48 +02:00
hda_regmap.h
ALSA: hda: Manage concurrent reg access more properly
2020-05-27 17:46:37 +02:00
hda_verbs.h
ALSA: hda: add verbs for stripe control
2019-01-14 19:52:23 +01:00
hdaudio_ext.h
ALSA: hda: hdac_ext_stream: fix potential locking issues
2021-11-26 10:47:23 +01:00
hdaudio.h
ALSA: hda: Manage concurrent reg access more properly
2020-05-27 17:46:37 +02:00
hdmi-codec.h
ASoC: hdmi-codec: Add an op to set callback function for plug event
2019-09-09 14:50:03 +01:00
hwdep.h
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i2c.h
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info.h
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initval.h
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intel-nhlt.h
ALSA: hda: intel-nhlt: verify config type
2021-03-09 11:09:39 +01:00
jack.h
ALSA: jack: Access input_dev under mutex
2022-06-14 18:11:25 +02:00
l3.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
madera-pdata.h
ASoC: madera: Update SPDX headers
2019-06-26 12:27:50 +01:00
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minors.h
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mixer_oss.h
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mpu401.h
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omap-hdmi-audio.h
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opl3.h
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opl4.h
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pcm_drm_eld.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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pcm_iec958.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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pcm_oss.h
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pcm_params.h
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pcm-indirect.h
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pcm.h
ALSA: pcm: Fix potential AB/BA lock with buffer_mutex and mmap_lock
2022-05-12 12:23:49 +02:00
pt2258.h
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pxa2xx-lib.h
ASoC: pxa: move some functions to pxa2xx-lib
2018-06-29 12:05:04 +01:00
rawmidi.h
ALSA: rawmidi: Fix racy buffer resize under concurrent accesses
2020-05-20 08:20:30 +02:00
rt286.h
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rt5670.h
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s3c24xx_uda134x.h
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sh_fsi.h
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simple_card_utils.h
ASoC: simple_card_utils.h: Add missing include
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simple_card.h
ASoC: simple-card: convert to SPDX identifiers
2018-07-02 10:52:47 +01:00
snd_wavefront.h
ASoC: Updates for v4.15
2017-11-13 15:45:57 +01:00
soc-acpi-intel-match.h
ASoC: Intel: common: add ACPI matching tables for EHL
2019-08-15 18:13:21 +01:00
soc-acpi.h
ASoC: soc-acpi: remove new_mach_data field
2019-02-12 16:56:06 +00:00
soc-component.h
ASoC: soc-component: add snd_soc_pcm_component_pcm_free()
2019-08-05 16:27:16 +01:00
soc-dai.h
ASoC: soc-dai: use bit field for bus_control
2019-08-22 18:30:26 +01:00
soc-dapm.h
Merge branch 'asoc-5.4' into asoc-next
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soc-dpcm.h
ASoC: soc-core: define soc_dpcm_debugfs_add() for non CONFIG_DEBUG_FS
2019-08-08 20:56:57 +01:00
soc-topology.h
ASoC: topology: unload physical dai link in remove
2019-02-04 11:59:30 +01:00
soc.h
ASoC: soc-core: disable route checks for legacy devices
2020-05-02 08:49:01 +02:00
sof.h
ASoC: SOF: Add Nocodec machine driver support
2019-04-28 02:49:26 +09:00
soundfont.h
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spear_dma.h
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tas5086.h
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