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| author | Ziyi Guo <n7l8m4@u.northwestern.edu> | 2026-02-10 18:57:14 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-02-26 14:59:43 -0800 |
| commit | 9a2a5da002775376498e8814df4a87cd629a3a0c (patch) | |
| tree | ad3b8f38cd493d01189de2d6fcd6c10f6b5fb025 /tools/perf/scripts/python/stackcollapse.py | |
| parent | a62afa5a595ec4a5bbb63a1d9efd6470b8ca39f2 (diff) | |
ASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put()
[ Upstream commit 9f16d96e1222391a6b996a1b676bec14fb91e3b2 ]
This reverts commit f51424872760 ("ASoC: fsl_xcvr: fix missing lock in fsl_xcvr_mode_put()").
The original patch attempted to acquire the card->controls_rwsem lock in
fsl_xcvr_mode_put(). However, this function is called from the upper ALSA
core function snd_ctl_elem_write(), which already holds the write lock on
controls_rwsem for the whole put operation. So there is no need to simply
hold the lock for fsl_xcvr_activate_ctl() again.
Acquiring the read lock while holding the write lock in the same thread
results in a deadlock and a hung task, as reported by Alexander Stein.
Fixes: f51424872760 ("ASoC: fsl_xcvr: fix missing lock in fsl_xcvr_mode_put()")
Reported-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Closes: https://lore.kernel.org/linux-sound/5056506.GXAFRqVoOG@steina-w/
Signed-off-by: Ziyi Guo <n7l8m4@u.northwestern.edu>
Link: https://patch.msgid.link/20260210185714.556385-1-n7l8m4@u.northwestern.edu
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions