- switch (runtime->status->state) {
- case SNDRV_PCM_STATE_PREPARED:
- if (size >= runtime->start_threshold) {
- err = snd_pcm_start(substream);
- if (err < 0)
- goto _end_unlock;
- }
- break;
- case SNDRV_PCM_STATE_DRAINING:
- case SNDRV_PCM_STATE_RUNNING:
- case SNDRV_PCM_STATE_PAUSED:
- break;
- case SNDRV_PCM_STATE_XRUN:
- err = -EPIPE;
- goto _end_unlock;
- case SNDRV_PCM_STATE_SUSPENDED:
- err = -ESTRPIPE;
- goto _end_unlock;
- default:
- err = -EBADFD;