snd_pcm_action
return snd_pcm_action(ops, substream, state);
return snd_pcm_action(&snd_pcm_action_start, substream,
return snd_pcm_action(&snd_pcm_action_stop, substream, state);
return snd_pcm_action(&snd_pcm_action_pause, substream,
return snd_pcm_action(&snd_pcm_action_suspend, substream,
result = snd_pcm_action(&snd_pcm_action_drain_init, substream,