diff --git a/[refs] b/[refs]
index 93d1f505ad9e..730e31407e73 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9624ea812c7afd2e403c56366cadddb9ecfb88c6
+refs/heads/master: daa150ef7d437d17973210f47a1c58623415df94
diff --git a/trunk/sound/usb/usbaudio.c b/trunk/sound/usb/usbaudio.c
index 3f7930c0b616..8d4a085f642a 100644
--- a/trunk/sound/usb/usbaudio.c
+++ b/trunk/sound/usb/usbaudio.c
@@ -815,8 +815,14 @@ static int wait_clear_urbs(snd_usb_substream_t *subs)
  */
 static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
 {
-	snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
-	return subs->hwptr_done;
+	snd_usb_substream_t *subs;
+	snd_pcm_uframes_t hwptr_done;
+	
+	subs = (snd_usb_substream_t *)substream->runtime->private_data;
+	spin_lock(&subs->lock);
+	hwptr_done = subs->hwptr_done;
+	spin_unlock(&subs->lock);
+	return hwptr_done;
 }