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| author | Takashi Iwai <tiwai@suse.de> | 2022-07-28 15:59:45 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-25 12:38:21 +0300 |
| commit | 857ccedcf569665809d351241d22247c6c55887f (patch) | |
| tree | 878683b51e3267b52306adaeb4fd0b7e5ac42a77 /include | |
| parent | 658bc550a4ec7116e345a84f51c5de436b81e6c9 (diff) | |
| download | linux-857ccedcf569665809d351241d22247c6c55887f.tar.xz | |
ALSA: control: Use deferred fasync helper
[ Upstream commit 4a971e84a7ae10a38d875cd2d4e487c8d1682ca3 ]
For avoiding the potential deadlock via kill_fasync() call, use the
new fasync helpers to defer the invocation from the control API. Note
that it's merely a workaround.
Another note: although we haven't received reports about the deadlock
with the control API, the deadlock is still potentially possible, and
it's better to align the behavior with other core APIs (PCM and
timer); so let's move altogether.
Link: https://lore.kernel.org/r/20220728125945.29533-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/control.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/sound/control.h b/include/sound/control.h index 77d9fa10812d..41bd72ffd232 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -103,7 +103,7 @@ struct snd_ctl_file { int preferred_subdevice[SND_CTL_SUBDEV_ITEMS]; wait_queue_head_t change_sleep; spinlock_t read_lock; - struct fasync_struct *fasync; + struct snd_fasync *fasync; int subscribed; /* read interface is activated */ struct list_head events; /* waiting events for read */ }; |