ALSA: pcm: Don't notify internal PCMs

Notifier shouldn't listen to the changes of internal PCMs.
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/pcm.c

@@ -888,7 +888,8 @@ static int snd_pcm_free(struct snd_pcm *pcm)
 
 	if (!pcm)
 		return 0;
-	list_for_each_entry(notify, &snd_pcm_notify_list, list) {
+	if (!pcm->internal) {
+		list_for_each_entry(notify, &snd_pcm_notify_list, list)
 			notify->n_unregister(pcm);
 	}
 	if (pcm->private_free)
@@ -1129,7 +1130,7 @@ static int snd_pcm_dev_disconnect(struct snd_device *device)
 	mutex_lock(&pcm->open_mutex);
 	wake_up(&pcm->open_wait);
 	list_del_init(&pcm->list);
-	for (cidx = 0; cidx < 2; cidx++)
+	for (cidx = 0; cidx < 2; cidx++) {
 		for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) {
 			snd_pcm_stream_lock_irq(substream);
 			if (substream->runtime) {
@@ -1139,7 +1140,9 @@ static int snd_pcm_dev_disconnect(struct snd_device *device)
 			}
 			snd_pcm_stream_unlock_irq(substream);
 		}
-	list_for_each_entry(notify, &snd_pcm_notify_list, list) {
+	}
+	if (!pcm->internal) {
+		list_for_each_entry(notify, &snd_pcm_notify_list, list)
 			notify->n_disconnect(pcm);
 	}
 	for (cidx = 0; cidx < 2; cidx++) {