--- zzzz-none-000/linux-4.9.218/net/bridge/br_if.c	2020-04-02 15:20:41.000000000 +0000
+++ seale-7590ax-750/linux-4.9.218/net/bridge/br_if.c	2023-03-29 10:59:08.000000000 +0000
@@ -262,6 +262,10 @@
 	struct net_bridge *br = p->br;
 	struct net_device *dev = p->dev;
 
+#ifdef CONFIG_MCAST_SNOOPING
+	br_mcast_port_cleanup(p);
+#endif
+
 	sysfs_remove_link(br->ifobj, p->dev->name);
 
 	nbp_delete_promisc(p);
@@ -360,10 +364,17 @@
 	dev_hold(dev);
 	p->dev = dev;
 	p->path_cost = port_cost(dev);
+	p->learning_limit = BRPORT_LEARNING_LIMIT_UNLIMITED;
 	p->priority = 0x8000 >> BR_PORT_BITS;
 	p->port_no = index;
-	p->flags = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD;
+	p->flags = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
 	br_init_port(p);
+
+#ifdef CONFIG_MCAST_SNOOPING
+	br_mcast_port_init(p);
+	spin_lock_init(&p->mghash_lock);
+#endif
+
 	br_set_state(p, BR_STATE_DISABLED);
 	br_stp_port_timer_init(p);
 	err = br_multicast_add_port(p);
@@ -593,6 +604,10 @@
 
 	kobject_uevent(&p->kobj, KOBJ_ADD);
 
+#ifdef CONFIG_MCAST_SNOOPING
+	br_ifinfo_notify(RTM_NEWLINK, p);
+#endif
+
 	return 0;
 
 err7:
@@ -644,6 +659,10 @@
 
 	netdev_update_features(br->dev);
 
+#ifdef CONFIG_MCAST_SNOOPING
+	br_ifinfo_notify(RTM_DELLINK, p);
+#endif
+
 	return 0;
 }