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authorTakashi Iwai <tiwai@suse.de>2020-11-19 15:14:40 +0300
committerTakashi Iwai <tiwai@suse.de>2020-11-19 20:26:30 +0300
commitd21b96c8ed2aea7e6b7bf4735e1d2503cfbf4072 (patch)
treed63676bc314235e78d3f730fb990339348626a83 /include
parent551310e7356cb8af4eb4c618961ad1e7b2f89e19 (diff)
downloadlinux-d21b96c8ed2aea7e6b7bf4735e1d2503cfbf4072.tar.xz
ALSA: mixart: Fix mutex deadlock
The code change for switching to non-atomic mode brought the unexpected mutex deadlock in get_msg(). It converted the spinlock with the existing mutex, but there were calls with the already holding the mutex. Since the only place that needs the extra lock is the code path from snd_mixart_send_msg(), remove the mutex lock in get_msg() and apply in the caller side for fixing the mutex deadlock. Fixes: 8d3a8b5cb57d ("ALSA: mixart: Use nonatomic PCM ops") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20201119121440.18945-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
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