diff options
Diffstat (limited to 'sound/usb/pcm.c')
| -rw-r--r-- | sound/usb/pcm.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index e26d37365f02..c66831ee15f9 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -613,11 +613,6 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) subs->last_frame_number = 0; runtime->delay = 0; - /* for playback, submit the URBs now; otherwise, the first hwptr_done - * updates for all URBs would happen at the same time when starting */ - if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) - ret = start_endpoints(subs); - unlock: snd_usb_unlock_shutdown(chip); return ret; @@ -1430,6 +1425,7 @@ static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substrea int cmd) { struct snd_usb_substream *subs = substream->runtime->private_data; + int err; switch (cmd) { case SNDRV_PCM_TRIGGER_START: @@ -1440,6 +1436,14 @@ static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substrea prepare_playback_urb, retire_playback_urb, subs); + if (cmd == SNDRV_PCM_TRIGGER_START) { + err = start_endpoints(subs); + if (err < 0) { + snd_usb_endpoint_set_callback(subs->data_endpoint, + NULL, NULL, NULL); + return err; + } + } subs->running = 1; dev_dbg(&subs->dev->dev, "%d:%d Start Playback PCM\n", subs->cur_audiofmt->iface, |