diff options
Diffstat (limited to 'sound/firewire/bebob/bebob_midi.c')
| -rw-r--r-- | sound/firewire/bebob/bebob_midi.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/sound/firewire/bebob/bebob_midi.c b/sound/firewire/bebob/bebob_midi.c index 120a61b90c59..c04cea2c19a6 100644 --- a/sound/firewire/bebob/bebob_midi.c +++ b/sound/firewire/bebob/bebob_midi.c @@ -11,17 +11,35 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream) { struct snd_bebob *bebob = substream->rmidi->private_data; + int err; + + err = snd_bebob_stream_lock_try(bebob); + if (err < 0) + goto end; atomic_inc(&bebob->capture_substreams); - return snd_bebob_stream_start_duplex(bebob, 0); + err = snd_bebob_stream_start_duplex(bebob, 0); + if (err < 0) + snd_bebob_stream_lock_release(bebob); +end: + return err; } static int midi_playback_open(struct snd_rawmidi_substream *substream) { struct snd_bebob *bebob = substream->rmidi->private_data; + int err; + + err = snd_bebob_stream_lock_try(bebob); + if (err < 0) + goto end; atomic_inc(&bebob->playback_substreams); - return snd_bebob_stream_start_duplex(bebob, 0); + err = snd_bebob_stream_start_duplex(bebob, 0); + if (err < 0) + snd_bebob_stream_lock_release(bebob); +end: + return err; } static int midi_capture_close(struct snd_rawmidi_substream *substream) @@ -31,6 +49,7 @@ static int midi_capture_close(struct snd_rawmidi_substream *substream) atomic_dec(&bebob->capture_substreams); snd_bebob_stream_stop_duplex(bebob); + snd_bebob_stream_lock_release(bebob); return 0; } @@ -41,6 +60,7 @@ static int midi_playback_close(struct snd_rawmidi_substream *substream) atomic_dec(&bebob->playback_substreams); snd_bebob_stream_stop_duplex(bebob); + snd_bebob_stream_lock_release(bebob); return 0; } |