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authorTakashi Iwai <tiwai@suse.de>2008-09-07 12:51:13 +0200
committerJaroslav Kysela <perex@perex.cz>2008-09-09 09:11:48 +0200
commitd8009882e9f5e1a76986c741f071edd2ad760c97 (patch)
tree7af54716fe7c5201acb3c2670a3047b3c6a2d5c9
parent3d8cb466a885cb5a0fb53ef3d39c36432d67fcbb (diff)
ALSA: use correct lock in snd_ctl_dev_disconnect()
The lock used in snd_ctl_dev_disconnect() should be card->ctl_files_rwlock for protection of card->ctl_files entries, instead of card->controls_rwsem. Reported-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
-rw-r--r--sound/core/control.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/core/control.c b/sound/core/control.c
index 3c5e746d619b..6d71f9a7ccbb 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1438,12 +1438,12 @@ static int snd_ctl_dev_disconnect(struct snd_device *device)
if (snd_BUG_ON(cardnum < 0 || cardnum >= SNDRV_CARDS))
return -ENXIO;
- down_read(&card->controls_rwsem);
+ read_lock(&card->ctl_files_rwlock);
list_for_each_entry(ctl, &card->ctl_files, list) {
wake_up(&ctl->change_sleep);
kill_fasync(&ctl->fasync, SIGIO, POLL_ERR);
}
- up_read(&card->controls_rwsem);
+ read_unlock(&card->ctl_files_rwlock);
if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL,
card, -1)) < 0)