--- /dev/null
+--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
++++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+@@ -1632,7 +1632,7 @@ static int compute_hw_mtu(struct bcm_ene
+ actual_mtu = mtu;
+
+ /* add ethernet header + vlan tag size */
+- actual_mtu += VLAN_ETH_HLEN;
++ actual_mtu += VLAN_ETH_HLEN + VLAN_HLEN;
+
+ if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
+ return -EINVAL;