ice: support non-standard teardown of bond interface

Code for supporting removal of the PF driver (NETDEV_UNREGISTER) events for
both when the bond has the primary interface as active and when failed over
to thew secondary interface.

Reviewed-by: Daniel Machon <daniel.machon@microchip.com>
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

Author: dmertman

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

@@ -1190,15 +1190,16 @@ static void ice_lag_changeupper_event(struct ice_lag *lag, void *ptr)
 		if (!primary_lag && lag->primary)
 			primary_lag = lag;
 
-		if (primary_lag) {
-			if (!lag->primary) {
-				ice_lag_set_swid(0, lag, false);
-			} else {
+		if (!lag->primary) {
+			ice_lag_set_swid(0, lag, false);
+		} else {
+			if (primary_lag && lag->primary) {
 				ice_lag_primary_swid(lag, false);
 				ice_lag_del_prune_list(primary_lag, lag->pf);
 			}
-			ice_lag_cfg_cp_fltr(lag, false);
 		}
+		/* remove filter for control packets */
+		ice_lag_cfg_cp_fltr(lag, false);
 	}
 }
 
@@ -1401,6 +1402,38 @@ ice_lag_chk_comp(struct ice_lag *lag, void *ptr)
 static void
 ice_lag_unregister(struct ice_lag *lag, struct net_device *event_netdev)
 {
+	struct ice_netdev_priv *np;
+	struct ice_pf *event_pf;
+	struct ice_lag *p_lag;
+
+	p_lag = ice_lag_find_primary(lag);
+	np = netdev_priv(event_netdev);
+	event_pf = np->vsi->back;
+
+	if (p_lag) {
+		if (p_lag->active_port != p_lag->pf->hw.port_info->lport &&
+		    p_lag->active_port != ICE_LAG_INVALID_PORT) {
+			struct ice_hw *active_hw;
+
+			active_hw = ice_lag_find_hw_by_lport(lag,
+							     p_lag->active_port);
+			if (active_hw)
+				ice_lag_reclaim_vf_nodes(p_lag, active_hw);
+			lag->active_port = ICE_LAG_INVALID_PORT;
+		}
+	}
+
+	/* primary processing for primary */
+	if (lag->primary && lag->netdev == event_netdev)
+		ice_lag_primary_swid(lag, false);
+
+	/* primary processing for secondary */
+	if (lag->primary && lag->netdev != event_netdev)
+		ice_lag_del_prune_list(lag, event_pf);
+
+	/* secondary processing for secondary */
+	if (!lag->primary && lag->netdev == event_netdev)
+		ice_lag_set_swid(0, lag, false);
 }
 
 /**
@@ -1470,8 +1503,8 @@ static void ice_lag_process_event(struct work_struct *work)
 	case NETDEV_UNREGISTER:
 		if (ice_is_feature_supported(pf, ICE_F_SRIOV_LAG)) {
 			netdev = lag_work->info.bonding_info.info.dev;
-			if (netdev == lag_work->lag->netdev &&
-			    lag_work->lag->bonded)
+			if ((netdev == lag_work->lag->netdev ||
+			     lag_work->lag->primary) && lag_work->lag->bonded)
 				ice_lag_unregister(lag_work->lag, netdev);
 		}
 		break;