mlxsw: spectrum_router: Generalize mlxsw_sp_netdevice_router_port_event()

Prepare mlxsw_sp_netdevice_router_port_event() for handling of
NETDEV_PRE_CHANGEADDR. Split out the part that deals with the actual
changes and call it for the two events currently handled.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -5326,7 +5326,7 @@ static int mlxsw_sp_netdevice_event(struct notifier_block *nb,
 		err = mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, dev,
 						       event, ptr);
 	else if (event == NETDEV_CHANGEADDR || event == NETDEV_CHANGEMTU)
-		err = mlxsw_sp_netdevice_router_port_event(dev);
+		err = mlxsw_sp_netdevice_router_port_event(dev, event, ptr);
 	else if (mlxsw_sp_is_vrf_event(event, ptr))
 		err = mlxsw_sp_netdevice_vrf_event(dev, event, ptr);
 	else if (mlxsw_sp_port_dev_check(dev))

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -454,7 +454,8 @@ union mlxsw_sp_l3addr {
 
 int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp);
 void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp);
-int mlxsw_sp_netdevice_router_port_event(struct net_device *dev);
+int mlxsw_sp_netdevice_router_port_event(struct net_device *dev,
+					 unsigned long event, void *ptr);
 void mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp,
 			      const struct net_device *macvlan_dev);
 int mlxsw_sp_inetaddr_event(struct notifier_block *unused,

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -6863,20 +6863,14 @@ static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
 	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
 }
 
-int mlxsw_sp_netdevice_router_port_event(struct net_device *dev)
+static int
+mlxsw_sp_router_port_change_event(struct mlxsw_sp *mlxsw_sp,
+				  struct mlxsw_sp_rif *rif)
 {
-	struct mlxsw_sp *mlxsw_sp;
-	struct mlxsw_sp_rif *rif;
+	struct net_device *dev = rif->dev;
 	u16 fid_index;
 	int err;
 
-	mlxsw_sp = mlxsw_sp_lower_get(dev);
-	if (!mlxsw_sp)
-		return 0;
-
-	rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
-	if (!rif)
-		return 0;
 	fid_index = mlxsw_sp_fid_index(rif->fid);
 
 	err = mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, false);
@@ -6920,6 +6914,29 @@ int mlxsw_sp_netdevice_router_port_event(struct net_device *dev)
 	return err;
 }
 
+int mlxsw_sp_netdevice_router_port_event(struct net_device *dev,
+					 unsigned long event, void *ptr)
+{
+	struct mlxsw_sp *mlxsw_sp;
+	struct mlxsw_sp_rif *rif;
+
+	mlxsw_sp = mlxsw_sp_lower_get(dev);
+	if (!mlxsw_sp)
+		return 0;
+
+	rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
+	if (!rif)
+		return 0;
+
+	switch (event) {
+	case NETDEV_CHANGEMTU: /* fall through */
+	case NETDEV_CHANGEADDR:
+		return mlxsw_sp_router_port_change_event(mlxsw_sp, rif);
+	}
+
+	return 0;
+}
+
 static int mlxsw_sp_port_vrf_join(struct mlxsw_sp *mlxsw_sp,
 				  struct net_device *l3_dev,
 				  struct netlink_ext_ack *extack)