net: Check CHANGEUPPER notifier return value

[deliverable/linux.git] / net / core / dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index 5df6cbce727c140684b84129c26ffc0606260cbb..939cd1b1da1569fd785ae1667d5a53ad0cdb69f2 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5490,8 +5490,12 @@ static int __netdev_upper_dev_link(struct net_device *dev,
                        goto rollback_lower_mesh;
        }
 
-       call_netdevice_notifiers_info(NETDEV_CHANGEUPPER, dev,
-                                     &changeupper_info.info);
+       ret = call_netdevice_notifiers_info(NETDEV_CHANGEUPPER, dev,
+                                           &changeupper_info.info);
+       ret = notifier_to_errno(ret);
+       if (ret)
+               goto rollback_lower_mesh;
+
        return 0;
 
 rollback_lower_mesh: