i40e: Prevent falling to promiscuous if the VF is not trusted

With this change a non trusted VF can never fall to promiscuous
mode when there is no room for a MAC/VLAN filter.

Change-Id: I8a155aa25c0bcdc6093414920c9ade4ee0bd20e8
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -2098,6 +2098,12 @@ int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
 		}
 	}
 
+	/* if the VF is not trusted do not do promisc */
+	if ((vsi->type == I40E_VSI_SRIOV) && !pf->vf[vsi->vf_id].trusted) {
+		clear_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state);
+		goto out;
+	}
+
 	/* check for changes in promiscuous modes */
 	if (changed_flags & IFF_ALLMULTI) {
 		bool cur_multipromisc;