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| author | Takashi Iwai <tiwai@suse.de> | 2007-02-07 14:07:08 +0100 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2007-02-09 09:03:58 +0100 |
| commit | 6116ea0741abf8f1ef9d93642d985f91c58ff6bf (patch) | |
| tree | f65c9a099a0448a776bb5daa91af590cf3b06008 /sound | |
| parent | 2594d960793f13582c0730a99c5396cded7cf9d9 (diff) | |
| download | linux-6116ea0741abf8f1ef9d93642d985f91c58ff6bf.tar.gz linux-6116ea0741abf8f1ef9d93642d985f91c58ff6bf.tar.bz2 linux-6116ea0741abf8f1ef9d93642d985f91c58ff6bf.zip | |
[ALSA] Fix possible deadlocks in sequencer at removal of ports
Fix possible rwsem deadlocks in sequencer code at removal of
sequencer ports. The list_lock of port group can be double
locked.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/core/seq/seq_ports.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/core/seq/seq_ports.c b/sound/core/seq/seq_ports.c index d88153438d69..eefd1cf872b4 100644 --- a/sound/core/seq/seq_ports.c +++ b/sound/core/seq/seq_ports.c @@ -245,9 +245,9 @@ static void clear_subscriber_list(struct snd_seq_client *client, list_del(&subs->dest_list); else list_del(&subs->src_list); + up_write(&agrp->list_mutex); unsubscribe_port(c, aport, agrp, &subs->info, 1); kfree(subs); - up_write(&agrp->list_mutex); snd_seq_port_unlock(aport); snd_seq_client_unlock(c); } |