net: bridge: split out the switchdev portion of br_mdb_notify

Similar to fdb_notify() and br_switchdev_fdb_notify(), split the
switchdev specific logic from br_mdb_notify() into a different function.
This will be moved later in br_switchdev.c.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/bridge/br_mdb.c

@@ -759,10 +759,10 @@ static void br_mdb_switchdev_host(struct net_device *dev,
 		br_mdb_switchdev_host_port(dev, lower_dev, mp, type);
 }
 
-void br_mdb_notify(struct net_device *dev,
-		   struct net_bridge_mdb_entry *mp,
-		   struct net_bridge_port_group *pg,
-		   int type)
+static void br_switchdev_mdb_notify(struct net_device *dev,
+				    struct net_bridge_mdb_entry *mp,
+				    struct net_bridge_port_group *pg,
+				    int type)
 {
 	struct br_mdb_complete_info *complete_info;
 	struct switchdev_obj_port_mdb mdb = {
@@ -771,33 +771,41 @@ void br_mdb_notify(struct net_device *dev,
 			.flags = SWITCHDEV_F_DEFER,
 		},
 	};
-	struct net *net = dev_net(dev);
-	struct sk_buff *skb;
-	int err = -ENOBUFS;
 
-	if (pg) {
-		br_switchdev_mdb_populate(&mdb, mp);
+	if (!pg)
+		return br_mdb_switchdev_host(dev, mp, type);
 
-		mdb.obj.orig_dev = pg->key.port->dev;
-		switch (type) {
-		case RTM_NEWMDB:
-			complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC);
-			if (!complete_info)
-				break;
-			complete_info->port = pg->key.port;
-			complete_info->ip = mp->addr;
-			mdb.obj.complete_priv = complete_info;
-			mdb.obj.complete = br_mdb_complete;
-			if (switchdev_port_obj_add(pg->key.port->dev, &mdb.obj, NULL))
-				kfree(complete_info);
-			break;
-		case RTM_DELMDB:
-			switchdev_port_obj_del(pg->key.port->dev, &mdb.obj);
+	br_switchdev_mdb_populate(&mdb, mp);
+
+	mdb.obj.orig_dev = pg->key.port->dev;
+	switch (type) {
+	case RTM_NEWMDB:
+		complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC);
+		if (!complete_info)
 			break;
-		}
-	} else {
-		br_mdb_switchdev_host(dev, mp, type);
+		complete_info->port = pg->key.port;
+		complete_info->ip = mp->addr;
+		mdb.obj.complete_priv = complete_info;
+		mdb.obj.complete = br_mdb_complete;
+		if (switchdev_port_obj_add(pg->key.port->dev, &mdb.obj, NULL))
+			kfree(complete_info);
+		break;
+	case RTM_DELMDB:
+		switchdev_port_obj_del(pg->key.port->dev, &mdb.obj);
+		break;
 	}
+}
+
+void br_mdb_notify(struct net_device *dev,
+		   struct net_bridge_mdb_entry *mp,
+		   struct net_bridge_port_group *pg,
+		   int type)
+{
+	struct net *net = dev_net(dev);
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+
+	br_switchdev_mdb_notify(dev, mp, pg, type);
 
 	skb = nlmsg_new(rtnl_mdb_nlmsg_size(pg), GFP_ATOMIC);
 	if (!skb)