diff --git a/[refs] b/[refs]
index a71559cc71d2..ae35ddf0c1df 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 104326f8df9925317cca64b84249d3eac5de7c74
+refs/heads/master: 9b08c2aa54948361da0e2d26b47e3bcb8f8911e8
diff --git a/trunk/sound/usb/usx2y/usx2yhwdeppcm.c b/trunk/sound/usb/usx2y/usx2yhwdeppcm.c
index 9acef9d90543..20708d2ffb6a 100644
--- a/trunk/sound/usb/usx2y/usx2yhwdeppcm.c
+++ b/trunk/sound/usb/usx2y/usx2yhwdeppcm.c
@@ -632,7 +632,7 @@ static int usX2Y_pcms_lock_check(struct snd_card *card)
 		for (s = 0; s < 2; ++s) {
 			struct snd_pcm_substream *substream;
 			substream = pcm->streams[s].substream;
-			if (SUBSTREAM_BUSY(substream))
+			if (substream && SUBSTREAM_BUSY(substream))
 				err = -EBUSY;
 		}
 	}