The internal device does support 802.1AD offloading since 
018c1dda5ff1
("openvswitch: 802.1AD Flow handling, actions, vlan parsing, netlink
attributes").
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Acked-by: Eric Garver <e@erig.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
 
        netdev->vlan_features = netdev->features;
        netdev->hw_enc_features = netdev->features;
-       netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
+       netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
        netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
 
        eth_hw_addr_random(netdev);