diff options
Diffstat (limited to 'sound/firewire/fireworks/fireworks_midi.c')
| -rw-r--r-- | sound/firewire/fireworks/fireworks_midi.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/firewire/fireworks/fireworks_midi.c b/sound/firewire/fireworks/fireworks_midi.c index fba01bbba456..38232dcf6e03 100644 --- a/sound/firewire/fireworks/fireworks_midi.c +++ b/sound/firewire/fireworks/fireworks_midi.c @@ -17,8 +17,10 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream) if (err < 0) goto end; + mutex_lock(&efw->mutex); atomic_inc(&efw->capture_substreams); err = snd_efw_stream_start_duplex(efw, 0); + mutex_unlock(&efw->mutex); if (err < 0) snd_efw_stream_lock_release(efw); @@ -35,8 +37,10 @@ static int midi_playback_open(struct snd_rawmidi_substream *substream) if (err < 0) goto end; + mutex_lock(&efw->mutex); atomic_inc(&efw->playback_substreams); err = snd_efw_stream_start_duplex(efw, 0); + mutex_unlock(&efw->mutex); if (err < 0) snd_efw_stream_lock_release(efw); end: @@ -47,8 +51,10 @@ static int midi_capture_close(struct snd_rawmidi_substream *substream) { struct snd_efw *efw = substream->rmidi->private_data; + mutex_lock(&efw->mutex); atomic_dec(&efw->capture_substreams); snd_efw_stream_stop_duplex(efw); + mutex_unlock(&efw->mutex); snd_efw_stream_lock_release(efw); return 0; @@ -58,8 +64,10 @@ static int midi_playback_close(struct snd_rawmidi_substream *substream) { struct snd_efw *efw = substream->rmidi->private_data; + mutex_lock(&efw->mutex); atomic_dec(&efw->playback_substreams); snd_efw_stream_stop_duplex(efw); + mutex_unlock(&efw->mutex); snd_efw_stream_lock_release(efw); return 0; |