mlxsw: spectrum_router: Flood packets to router after RIF creation

If a packet ingress the router but can't be assigned an ingress RIF,
it's dropped.

Therefore, in the case of RIF configured on top of a bridge, it makes
sense to start flooding broadcast packets to the router only after the
RIF was created.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -3353,10 +3353,6 @@ static int mlxsw_sp_rif_bridge_create(struct mlxsw_sp *mlxsw_sp,
 	if (IS_ERR(vr))
 		return PTR_ERR(vr);
 
-	err = mlxsw_sp_router_port_flood_set(mlxsw_sp, f->fid, true);
-	if (err)
-		goto err_port_flood_set;
-
 	rif = mlxsw_sp_rif_alloc(rif_index, vr->id, l3_dev, f, false);
 	if (!rif) {
 		err = -ENOMEM;
@@ -3367,6 +3363,10 @@ static int mlxsw_sp_rif_bridge_create(struct mlxsw_sp *mlxsw_sp,
 	if (err)
 		goto err_rif_bridge_op;
 
+	err = mlxsw_sp_router_port_flood_set(mlxsw_sp, f->fid, true);
+	if (err)
+		goto err_port_flood_set;
+
 	err = mlxsw_sp_rif_fdb_op(mlxsw_sp, l3_dev->dev_addr, f->fid, true);
 	if (err)
 		goto err_rif_fdb_op;
@@ -3380,12 +3380,12 @@ static int mlxsw_sp_rif_bridge_create(struct mlxsw_sp *mlxsw_sp,
 	return 0;
 
 err_rif_fdb_op:
+	mlxsw_sp_router_port_flood_set(mlxsw_sp, f->fid, false);
+err_port_flood_set:
 	mlxsw_sp_rif_bridge_op(mlxsw_sp, rif, false);
 err_rif_bridge_op:
 	kfree(rif);
 err_rif_alloc:
-	mlxsw_sp_router_port_flood_set(mlxsw_sp, f->fid, false);
-err_port_flood_set:
 	mlxsw_sp_vr_put(vr);
 	return err;
 }
@@ -3406,12 +3406,12 @@ void mlxsw_sp_rif_bridge_destroy(struct mlxsw_sp *mlxsw_sp,
 
 	mlxsw_sp_rif_fdb_op(mlxsw_sp, l3_dev->dev_addr, f->fid, false);
 
+	mlxsw_sp_router_port_flood_set(mlxsw_sp, f->fid, false);
+
 	mlxsw_sp_rif_bridge_op(mlxsw_sp, rif, false);
 
 	kfree(rif);
 
-	mlxsw_sp_router_port_flood_set(mlxsw_sp, f->fid, false);
-
 	mlxsw_sp_vr_put(vr);
 
 	netdev_dbg(l3_dev, "RIF=%d destroyed\n", rif_index);