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ALSA: pcm: Add snd_pcm_stop_xrun() helper

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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>
This commit is contained in:
Takashi Iwai
2014-11-07 17:08:28 +01:00
parent 31584ed18c
commit 1fb8510cdb
15 changed files with 46 additions and 78 deletions
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sound/usb/endpoint.c
+1 -3
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@@ -391,9 +391,7 @@ static void snd_complete_urb(struct urb *urb)
usb_audio_err(ep->chip, "cannot submit urb (err = %d)\n", err);
if (ep->data_subs && ep->data_subs->pcm_substream) {
substream = ep->data_subs->pcm_substream;
snd_pcm_stream_lock_irqsave(substream, flags);
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
snd_pcm_stream_unlock_irqrestore(substream, flags);
snd_pcm_stop_xrun(substream);
}
exit_clear: