diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 71c109b0943f..f1140cf5168d 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1853,7 +1853,10 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
 	int err = -EINVAL;
 
 	spin_lock(&br->multicast_lock);
-
+	if (p->multicast_router == val) {
+		err = 0;
+		goto unlock;
+	}
 	switch (val) {
 	case MDB_RTR_TYPE_DISABLED:
 		p->multicast_router = MDB_RTR_TYPE_DISABLED;