snd_pcm_status    503 include/sound/pcm.h int snd_pcm_status(struct snd_pcm_substream *substream,
snd_pcm_status    504 include/sound/pcm.h 		   struct snd_pcm_status *status);
snd_pcm_status    531 include/uapi/sound/asound.h #define SNDRV_PCM_IOCTL_STATUS		_IOR('A', 0x20, struct snd_pcm_status)