bridge: try switchdev op first in __vlan_vid_add/del

Some drivers need to implement both switchdev vlan ops and
vid_add/kill ndos. For that to work in bridge code, we need to try
switchdev op first when adding/deleting vlan id.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_vlan.c

@@ -72,28 +72,20 @@ static void __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
 			  u16 vid, u16 flags)
 {
-	const struct net_device_ops *ops = dev->netdev_ops;
+	struct switchdev_obj_port_vlan v = {
+		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+		.flags = flags,
+		.vid_begin = vid,
+		.vid_end = vid,
+	};
 	int err;
 
-	/* If driver uses VLAN ndo ops, use 8021q to install vid
-	 * on device, otherwise try switchdev ops to install vid.
+	/* Try switchdev op first. In case it is not supported, fallback to
+	 * 8021q add.
 	 */
-
-	if (ops->ndo_vlan_rx_add_vid) {
-		err = vlan_vid_add(dev, br->vlan_proto, vid);
-	} else {
-		struct switchdev_obj_port_vlan v = {
-			.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
-			.flags = flags,
-			.vid_begin = vid,
-			.vid_end = vid,
-		};
-
-		err = switchdev_port_obj_add(dev, &v.obj);
-		if (err == -EOPNOTSUPP)
-			err = 0;
-	}
-
+	err = switchdev_port_obj_add(dev, &v.obj);
+	if (err == -EOPNOTSUPP)
+		return vlan_vid_add(dev, br->vlan_proto, vid);
 	return err;
 }
 
@@ -122,27 +114,21 @@ static void __vlan_del_list(struct net_bridge_vlan *v)
 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
 			  u16 vid)
 {
-	const struct net_device_ops *ops = dev->netdev_ops;
-	int err = 0;
+	struct switchdev_obj_port_vlan v = {
+		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+		.vid_begin = vid,
+		.vid_end = vid,
+	};
+	int err;
 
-	/* If driver uses VLAN ndo ops, use 8021q to delete vid
-	 * on device, otherwise try switchdev ops to delete vid.
+	/* Try switchdev op first. In case it is not supported, fallback to
+	 * 8021q del.
 	 */
-
-	if (ops->ndo_vlan_rx_kill_vid) {
+	err = switchdev_port_obj_del(dev, &v.obj);
+	if (err == -EOPNOTSUPP) {
 		vlan_vid_del(dev, br->vlan_proto, vid);
-	} else {
-		struct switchdev_obj_port_vlan v = {
-			.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
-			.vid_begin = vid,
-			.vid_end = vid,
-		};
-
-		err = switchdev_port_obj_del(dev, &v.obj);
-		if (err == -EOPNOTSUPP)
-			err = 0;
+		return 0;
 	}
-
 	return err;
 }