ice: Restore fix disabling RX VLAN filtering

Fix setting dis_rx_filtering depending on whether port vlan is being
turned on or off. This was originally fixed in commit c793f8ea ("ice:
Fix disabling Rx VLAN filtering with port VLAN enabled"), but while
refactoring ice_vf_vsi_init_vlan_ops(), the fix has been lost. Restore the
fix along with the original comment from that change.

Also delete duplicate lines in ice_port_vlan_on().

Fixes: 2946204b ("ice: implement bridge port vlan")
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice_vf_vsi_vlan_ops.c

@@ -32,7 +32,6 @@ static void ice_port_vlan_on(struct ice_vsi *vsi)
 		/* setup outer VLAN ops */
 		vlan_ops->set_port_vlan = ice_vsi_set_outer_port_vlan;
 		vlan_ops->clear_port_vlan = ice_vsi_clear_outer_port_vlan;
-		vlan_ops->clear_port_vlan = ice_vsi_clear_outer_port_vlan;
 
 		/* setup inner VLAN ops */
 		vlan_ops = &vsi->inner_vlan_ops;
@@ -47,8 +46,13 @@ static void ice_port_vlan_on(struct ice_vsi *vsi)
 
 		vlan_ops->set_port_vlan = ice_vsi_set_inner_port_vlan;
 		vlan_ops->clear_port_vlan = ice_vsi_clear_inner_port_vlan;
-		vlan_ops->clear_port_vlan = ice_vsi_clear_inner_port_vlan;
 	}
+
+	/* all Rx traffic should be in the domain of the assigned port VLAN,
+	 * so prevent disabling Rx VLAN filtering
+	 */
+	vlan_ops->dis_rx_filtering = noop_vlan;
+
 	vlan_ops->ena_rx_filtering = ice_vsi_ena_rx_vlan_filtering;
 }
 
@@ -77,6 +81,8 @@ static void ice_port_vlan_off(struct ice_vsi *vsi)
 		vlan_ops->del_vlan = ice_vsi_del_vlan;
 	}
 
+	vlan_ops->dis_rx_filtering = ice_vsi_dis_rx_vlan_filtering;
+
 	if (!test_bit(ICE_FLAG_VF_VLAN_PRUNING, pf->flags))
 		vlan_ops->ena_rx_filtering = noop_vlan;
 	else
@@ -141,7 +147,6 @@ void ice_vf_vsi_init_vlan_ops(struct ice_vsi *vsi)
 		&vsi->outer_vlan_ops : &vsi->inner_vlan_ops;
 
 	vlan_ops->add_vlan = ice_vsi_add_vlan;
-	vlan_ops->dis_rx_filtering = ice_vsi_dis_rx_vlan_filtering;
 	vlan_ops->ena_tx_filtering = ice_vsi_ena_tx_vlan_filtering;
 	vlan_ops->dis_tx_filtering = ice_vsi_dis_tx_vlan_filtering;
 }