From: Takashi Iwai <tiwai@suse.de>
To: alsa-devel@alsa-project.org
Subject: [alsa-devel] [PATCH] ALSA: timer: Fix the breakage of slave link open
Date: Mon, 11 Nov 2019 18:36:42 +0100 [thread overview]
Message-ID: <20191111173642.6093-1-tiwai@suse.de> (raw)
A silly mistake was made while applying the fix for potential races in
commit 6a34367e52ca ("ALSA: timer: Fix possible race at assigning a
timer instance"): when a slave PCM is opened and succeeds, it doesn't
return but proceeds to the master timer open code instead. Plug the
hole and beautify a bit.
Fixes: 6a34367e52ca ("ALSA: timer: Fix possible race at assigning a timer instance")
Reported-by: syzbot+4476917c053f60112c99@syzkaller.appspotmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/core/timer.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 9091030f4a89..24fed5c78273 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -268,8 +268,7 @@ int snd_timer_open(struct snd_timer_instance *timeri,
list_add_tail(&timeri->open_list, &snd_timer_slave_list);
num_slaves++;
err = snd_timer_check_slave(timeri);
- if (err < 0)
- goto close;
+ goto list_added;
}
/* open a master instance */
@@ -324,7 +323,7 @@ int snd_timer_open(struct snd_timer_instance *timeri,
list_add_tail(&timeri->open_list, &timer->open_list_head);
timer->num_instances++;
err = snd_timer_check_master(timeri);
- close:
+list_added:
if (err < 0)
snd_timer_close_locked(timeri, &card_dev_to_put);
--
2.16.4
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