diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c
--- a/sys/dev/sound/pcm/sound.c
+++ b/sys/dev/sound/pcm/sound.c
@@ -635,17 +635,12 @@
 			si->hw_info[0] = '\0';
 			si->intr_count = si->ack_count = 0;
 		} else {
-			PCM_UNLOCKASSERT(d);
-			PCM_LOCK(d);
-
 			strlcpy(si->shortname, device_get_nameunit(d->dev),
 			    sizeof(si->shortname));
 			strlcpy(si->longname, device_get_desc(d->dev),
 			    sizeof(si->longname));
 			strlcpy(si->hw_info, d->status, sizeof(si->hw_info));
 			si->intr_count = si->ack_count = 0;
-
-			PCM_UNLOCK(d);
 		}
 
 		bus_topo_unlock();