macvlan: propagate the mac address change status for lowerdev

The macvlan dev should propagate the return value of mac address change for
lower device in the passthru mode, instead of always return 0.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/macvlan.c

@@ -703,10 +703,8 @@ static int macvlan_set_mac_address(struct net_device *dev, void *p)
 	if (!is_valid_ether_addr(addr->sa_data))
 		return -EADDRNOTAVAIL;
 
-	if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
-		dev_set_mac_address(vlan->lowerdev, addr);
-		return 0;
-	}
+	if (vlan->mode == MACVLAN_MODE_PASSTHRU)
+		return dev_set_mac_address(vlan->lowerdev, addr);
 
 	return macvlan_sync_address(dev, addr->sa_data);
 }