From: Jia Zhou zhou.jia2@zte.com.cn
[ Upstream commit abc21649b3e5c34b143bf86f0c78e33d5815e250 ]
modification in commit 2a3f7221acdd ("ALSA: core: Fix card races between register and disconnect") resulting in this problem.
Fixes: 2a3f7221acdd ("ALSA: core: Fix card races between register and disconnect") Signed-off-by: Jia Zhou zhou.jia2@zte.com.cn Signed-off-by: Yi Wang wang.yi59@zte.com.cn Link: https://lore.kernel.org/r/1616989007-34429-1-git-send-email-wang.yi59@zte.co... Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- sound/core/init.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/sound/core/init.c b/sound/core/init.c index cc8208df26f3..29f1ed707fd1 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -388,10 +388,8 @@ int snd_card_disconnect(struct snd_card *card) return 0; } card->shutdown = 1; - spin_unlock(&card->files_lock);
/* replace file->f_op with special dummy operations */ - spin_lock(&card->files_lock); list_for_each_entry(mfile, &card->files_list, list) { /* it's critical part, use endless loop */ /* we have no room to fail */