777e55e30d
Since all packets are transmitted as VLAN-tagged over a DSA link (this VLAN tag represents the tag_8021q header), we need to increase the MTU of these interfaces to account for the possibility that we are already transporting a user-visible VLAN header. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>