ALSA: bebob: change the range of critical section for stream data in PCM.hw_free callback

The operation of duplex streams should be in critical section.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files 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);
 }