The operation of duplex streams should be in critical section.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/bebob/bebob_pcm.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/sound/firewire/bebob/bebob_pcm.c b/sound/firewire/bebob/bebob_pcm.c index 530db7a7844c..e21de44deaa9 100644 --- a/sound/firewire/bebob/bebob_pcm.c +++ b/sound/firewire/bebob/bebob_pcm.c @@ -213,14 +213,15 @@ static int pcm_hw_free(struct snd_pcm_substream *substream) { struct snd_bebob *bebob = substream->private_data;
- if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { - mutex_lock(&bebob->mutex); + mutex_lock(&bebob->mutex); + + if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) bebob->substreams_counter--; - mutex_unlock(&bebob->mutex); - }
snd_bebob_stream_stop_duplex(bebob);
+ mutex_unlock(&bebob->mutex); + return snd_pcm_lib_free_vmalloc_buffer(substream); }