diff --git a/[refs] b/[refs]
index f2a34cbc3ab6..006dff4660b5 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 93d9b7d7a85cfb4e1711d5226eba73586dd4919f
+refs/heads/master: 3ca5b4042ecae5e73c59de62e4ac0db31c10e0f8
diff --git a/trunk/drivers/net/bonding/bond_main.c b/trunk/drivers/net/bonding/bond_main.c
index 7eeb18751d67..cbe9e353d46a 100644
--- a/trunk/drivers/net/bonding/bond_main.c
+++ b/trunk/drivers/net/bonding/bond_main.c
@@ -1480,8 +1480,15 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 				 bond_dev->name,
 				 bond_dev->type, slave_dev->type);
 
-			netdev_bonding_change(bond_dev,
-					      NETDEV_PRE_TYPE_CHANGE);
+			res = netdev_bonding_change(bond_dev,
+						    NETDEV_PRE_TYPE_CHANGE);
+			res = notifier_to_errno(res);
+			if (res) {
+				pr_err("%s: refused to change device type\n",
+				       bond_dev->name);
+				res = -EBUSY;
+				goto err_undo_flags;
+			}
 
 			if (slave_dev->type != ARPHRD_ETHER)
 				bond_setup_by_slave(bond_dev, slave_dev);
diff --git a/trunk/include/linux/netdevice.h b/trunk/include/linux/netdevice.h
index 726ecd1af535..813bed723f58 100644
--- a/trunk/include/linux/netdevice.h
+++ b/trunk/include/linux/netdevice.h
@@ -2005,7 +2005,7 @@ extern void		__dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct
 extern int		dev_set_promiscuity(struct net_device *dev, int inc);
 extern int		dev_set_allmulti(struct net_device *dev, int inc);
 extern void		netdev_state_change(struct net_device *dev);
-extern void		netdev_bonding_change(struct net_device *dev,
+extern int		netdev_bonding_change(struct net_device *dev,
 					      unsigned long event);
 extern void		netdev_features_change(struct net_device *dev);
 /* Load a device via the kmod */
diff --git a/trunk/net/core/dev.c b/trunk/net/core/dev.c
index 1a7e1d1d5ad9..d1f027c41e73 100644
--- a/trunk/net/core/dev.c
+++ b/trunk/net/core/dev.c
@@ -1084,9 +1084,9 @@ void netdev_state_change(struct net_device *dev)
 }
 EXPORT_SYMBOL(netdev_state_change);
 
-void netdev_bonding_change(struct net_device *dev, unsigned long event)
+int netdev_bonding_change(struct net_device *dev, unsigned long event)
 {
-	call_netdevice_notifiers(event, dev);
+	return call_netdevice_notifiers(event, dev);
 }
 EXPORT_SYMBOL(netdev_bonding_change);