ALSA: usb-audio: ignore delay calculation for capture stream

It doesn't make sense to calculate the delay for capture streams in the current implementation. It's always zero, so we should skip the computation in snd_usb_pcm_pointer() in the case of capture. Signed-off-by: Takashi Iwai <[email protected]>
simeranjitbrar · Nov 23, 2012 · 3f94fad · 3f94fad
1 parent ffe4d12
commit 3f94fad
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
@@ -75,7 +75,8 @@ static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream
 		return SNDRV_PCM_POS_XRUN;
 	spin_lock(&subs->lock);
 	hwptr_done = subs->hwptr_done;
-	substream->runtime->delay = snd_usb_pcm_delay(subs,
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		substream->runtime->delay = snd_usb_pcm_delay(subs,
 						substream->runtime->rate);
 	spin_unlock(&subs->lock);
 	return hwptr_done / (substream->runtime->frame_bits >> 3);