ice: block LAN in case of VF to VF offload

VF to VF traffic shouldn't go outside. To enforce it, set only the loopback
enable bit in case of all ingress type rules added via the tc tool.

Fixes: 0d08a441 ("ice: ndo_setup_tc implementation for PF")
Reported-by: Sujai Buvaneswaran <Sujai.Buvaneswaran@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -693,17 +693,18 @@ ice_eswitch_add_tc_fltr(struct ice_vsi *vsi, struct ice_tc_flower_fltr *fltr)
 	 * results into order of switch rule evaluation.
 	 */
 	rule_info.priority = 7;
+	rule_info.flags_info.act_valid = true;
 
 	if (fltr->direction == ICE_ESWITCH_FLTR_INGRESS) {
 		rule_info.sw_act.flag |= ICE_FLTR_RX;
 		rule_info.sw_act.src = hw->pf_id;
 		rule_info.rx = true;
+		rule_info.flags_info.act = ICE_SINGLE_ACT_LB_ENABLE;
 	} else {
 		rule_info.sw_act.flag |= ICE_FLTR_TX;
 		rule_info.sw_act.src = vsi->idx;
 		rule_info.rx = false;
 		rule_info.flags_info.act = ICE_SINGLE_ACT_LAN_ENABLE;
-		rule_info.flags_info.act_valid = true;
 	}
 
 	/* specify the cookie as filter_rule_id */