ipvlan: call netdevice notifier when master mac address changed

When master device's mac has been changed, the commit
32c10bbf ("ipvlan: always use the current L2 addr of the
master") makes the IPVlan devices's mac changed also, but it
doesn't do related works such as flush the IPVlan devices's
arp table.
Signed-off-by: NKeefe Liu <liuqifa@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ipvlan/ipvlan_main.c

@@ -792,8 +792,10 @@ static int ipvlan_device_event(struct notifier_block *unused,
 		break;
 
 	case NETDEV_CHANGEADDR:
-		list_for_each_entry(ipvlan, &port->ipvlans, pnode)
+		list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
 			ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr);
+			call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev);
+		}
 		break;
 
 	case NETDEV_PRE_TYPE_CHANGE: