diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index d6b4a84..6dfd19e 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -337,6 +337,21 @@
 }
 EXPORT_SYMBOL_GPL(switchdev_port_attr_set);
 
+static size_t switchdev_obj_size(const struct switchdev_obj *obj)
+{
+	switch (obj->id) {
+	case SWITCHDEV_OBJ_ID_PORT_VLAN:
+		return sizeof(struct switchdev_obj_port_vlan);
+	case SWITCHDEV_OBJ_ID_IPV4_FIB:
+		return sizeof(struct switchdev_obj_ipv4_fib);
+	case SWITCHDEV_OBJ_ID_PORT_FDB:
+		return sizeof(struct switchdev_obj_port_fdb);
+	default:
+		BUG();
+	}
+	return 0;
+}
+
 static int __switchdev_port_obj_add(struct net_device *dev,
 				    const struct switchdev_obj *obj,
 				    struct switchdev_trans *trans)
@@ -422,7 +437,7 @@
 static int switchdev_port_obj_add_defer(struct net_device *dev,
 					const struct switchdev_obj *obj)
 {
-	return switchdev_deferred_enqueue(dev, obj, sizeof(*obj),
+	return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj),
 					  switchdev_port_obj_add_deferred);
 }
 
@@ -490,7 +505,7 @@
 static int switchdev_port_obj_del_defer(struct net_device *dev,
 					const struct switchdev_obj *obj)
 {
-	return switchdev_deferred_enqueue(dev, obj, sizeof(*obj),
+	return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj),
 					  switchdev_port_obj_del_deferred);
 }