diff --git a/sound/core/seq/seq_ports.c b/sound/core/seq/seq_ports.c
index 5f46ee9e2174192c89943d4582148b2b6ca583a7..334579a9f268b692178ee301ec3103c4072d8981 100644
--- a/sound/core/seq/seq_ports.c
+++ b/sound/core/seq/seq_ports.c
@@ -221,7 +221,6 @@ static void clear_subscriber_list(struct snd_seq_client *client,
 {
 	struct list_head *p, *n;
 
-	down_write(&grp->list_mutex);
 	list_for_each_safe(p, n, &grp->list_head) {
 		struct snd_seq_subscribers *subs;
 		struct snd_seq_client *c;
@@ -259,7 +258,6 @@ static void clear_subscriber_list(struct snd_seq_client *client,
 			snd_seq_client_unlock(c);
 		}
 	}
-	up_write(&grp->list_mutex);
 }
 
 /* delete port data */