ALSA: pcm: Add snd_pcm_stop_xrun() helper

Add a new helper function snd_pcm_stop_xrun() to the standard sequnce
lock/snd_pcm_stop(XRUN)/unlock by a single call, and replace the
existing open codes with this helper.

The function checks the PCM running state to prevent setting the wrong
state, too, for more safety.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/asihpi/asihpi.c

@@ -769,10 +769,7 @@ static void snd_card_asihpi_timer_function(unsigned long data)
 						s->number);
 				ds->drained_count++;
 				if (ds->drained_count > 20) {
-					unsigned long flags;
-					snd_pcm_stream_lock_irqsave(s, flags);
-					snd_pcm_stop(s, SNDRV_PCM_STATE_XRUN);
-					snd_pcm_stream_unlock_irqrestore(s, flags);
+					snd_pcm_stop_xrun(s);
 					continue;
 				}
 			} else {