The patch in 5.15 aa9ff6a4955f ("ASoC: soc-compress: Reposition and add pcm_mutex") will cause the deadlock when close compress playback.
It needs backport patch b7898396f4 ("ASoC: soc-pcm: Fix and cleanup DPCM locking commit") to prevent the deadlock issue.
Rootcause is patch b7898396f4 will remove pcm_mutex in soc_pcm_hw_clean then patch aa9ff6a4955f add pcm_mutex acqurie back in snd_compr_free to fix regression cause from b7898396f4. If only apply aa9ff6a4955f, it will acqurie pcm_mutex twice cause the deadlock.
There are total 6 patches on these related backport
[ 212.063445] sysrq: Show Blocked State [ 212.064964] Call trace: [ 212.064974] __switch_to+0x244/0x454 [ 212.065075] __schedule+0x5fc/0xbdc [ 212.065092] schedule+0x154/0x258 [ 212.065103] schedule_preempt_disabled+0x30/0x50 [ 212.065115] __mutex_lock+0x36c/0x794 [ 212.065135] __mutex_lock_slowpath+0x1c/0x2c [ 212.065145] soc_pcm_hw_clean+0x6c/0x364 [ 212.065177] dpcm_be_dai_hw_free+0x20c/0x304 [ 212.065188] soc_compr_free_fe+0x130/0x448 [ 212.065230] snd_compr_free+0xac/0x148 [ 212.065316] __fput+0x104/0x438 [ 212.065347] ____fput+0x18/0x28 [ 212.065409] task_work_run+0x144/0x1f8 [ 212.065474] do_notify_resume+0x1d24/0x27b0 [ 212.065518] el0_svc+0x68/0xc4 [ 212.065601] el0t_64_sync_handler+0x8c/0xfc [ 212.065610] el0t_64_sync+0x1b0/0x1b4
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Pierre-Louis Bossart (4): ASoC: soc-pcm: use GFP_ATOMIC for dpcm structure ASoC: soc-pcm: align BE 'atomicity' with that of the FE ASoC: soc-pcm: test refcount before triggering ASoC: soc-pcm: fix BE handling of PAUSE_RELEASE
Takashi Iwai (2): ASoC: soc-pcm: Fix and cleanup DPCM locking ASoC: soc-pcm: serialize BE triggers
include/sound/soc-dpcm.h | 2 + include/sound/soc.h | 2 - sound/soc/soc-core.c | 1 - sound/soc/soc-pcm.c | 351 +++++++++++++++++++++++++++------------ 4 files changed, 246 insertions(+), 110 deletions(-)