--- zzzz-none-000/linux-4.9.279/net/bridge/br_device.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/net/bridge/br_device.c	2023-02-08 11:43:43.000000000 +0000
@@ -189,11 +189,11 @@
 static int br_change_mtu(struct net_device *dev, int new_mtu)
 {
 	struct net_bridge *br = netdev_priv(dev);
-	if (new_mtu < 68 || new_mtu > br_min_mtu(br))
-		return -EINVAL;
 
 	dev->mtu = new_mtu;
 
+	/* this flag will be cleared if the MTU was automatically adjusted */
+	br->mtu_set_by_user = true;
 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 	/* remember the MTU in the rtable for PMTU */
 	dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
@@ -420,8 +420,16 @@
 	br->bridge_hello_time = br->hello_time = 2 * HZ;
 	br->bridge_forward_delay = br->forward_delay = 15 * HZ;
 	br->ageing_time = BR_DEFAULT_AGEING_TIME;
+	dev->max_mtu = ETH_MAX_MTU;
 
 	br_netfilter_rtable_init(br);
 	br_stp_timer_init(br);
 	br_multicast_init(br);
+	br_flood_rl_setup(br);
+#ifdef CONFIG_TI_L2_SELECTIVE_PACKET_HANDLING
+    br->selective_packet_handler = NULL;
+#endif /* CONFIG_TI_L2_SELECTIVE_PACKET_HANDLING */
+#ifdef CONFIG_LTQ_MCAST_SNOOPING
+    br->this_br_snooping_enabled = false;
+#endif /* CONFIG_LTQ_MCAST_SNOOPING */
 }