ETHSW_VLAN_UNTAGGED
if (port_priv->vlans[vid] & ETHSW_VLAN_UNTAGGED) {
port_priv->vlans[vid] &= ~ETHSW_VLAN_UNTAGGED;
if (!(port_priv->vlans[vid] & ETHSW_VLAN_UNTAGGED)) {
port_priv->vlans[vid] |= ETHSW_VLAN_UNTAGGED;
} else if (changed && (port_priv->vlans[vid] & ETHSW_VLAN_UNTAGGED)) {
port_priv->vlans[vid] &= ~ETHSW_VLAN_UNTAGGED;