X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=sound%2Fusb%2Fpcm.c;h=d82e378d37cbb7202aaa487b6003b6b171b79eab;hb=d7df025eb4c3c571532326b01e007be52c75e5c0;hp=c6593101c049b88ca6e5661f8765b3f3df0b4d33;hpb=2d4dce0070448bcb5ccd04553a4be4635417f565;p=firefly-linux-kernel-4.4.55.git

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index c6593101c049..d82e378d37cb 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -511,6 +511,16 @@ static int configure_sync_endpoint(struct snd_usb_substream *subs)
 	struct snd_usb_substream *sync_subs =
 		&subs->stream->substream[subs->direction ^ 1];
 
+	if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA ||
+	    !subs->stream)
+		return snd_usb_endpoint_set_params(subs->sync_endpoint,
+						   subs->pcm_format,
+						   subs->channels,
+						   subs->period_bytes,
+						   subs->cur_rate,
+						   subs->cur_audiofmt,
+						   NULL);
+
 	/* Try to find the best matching audioformat. */
 	list_for_each_entry(fp, &sync_subs->fmt_list, list) {
 		int score = match_endpoint_audioformats(fp, subs->cur_audiofmt,