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-rw-r--r--drivers/net/macvlan.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 40faa368b07..445e73c343b 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -748,6 +748,9 @@ static int macvlan_device_event(struct notifier_block *unused,
list_for_each_entry_safe(vlan, next, &port->vlans, list)
vlan->dev->rtnl_link_ops->dellink(vlan->dev, NULL);
break;
+ case NETDEV_PRE_TYPE_CHANGE:
+ /* Forbid underlaying device to change its type. */
+ return NOTIFY_BAD;
}
return NOTIFY_DONE;
}