From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 19 Jan 2015 14:11:17 +0000 (+0100)
Subject: ALSA: line6: Don't handle PCM trigger for other cards
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=7d70c81ccaccb74326255fb9549c872bc29193d6;p=deliverable%2Flinux.git

ALSA: line6: Don't handle PCM trigger for other cards

Otherwise it oopses.

Tested-by: Chris Rorvick <chris@rorvick.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/usb/line6/pcm.c b/sound/usb/line6/pcm.c
index 520cf540e83c..932cc7e194e2 100644
--- a/sound/usb/line6/pcm.c
+++ b/sound/usb/line6/pcm.c
@@ -233,6 +233,8 @@ int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
 	clear_bit(LINE6_INDEX_PREPARED, &line6pcm->flags);
 
 	snd_pcm_group_for_each_entry(s, substream) {
+		if (s->pcm->card != substream->pcm->card)
+			continue;
 		switch (s->stream) {
 		case SNDRV_PCM_STREAM_PLAYBACK:
 			err = snd_line6_playback_trigger(line6pcm, cmd);