net: propagate dev_get_valid_name return code

if dev_get_valid_name failed, propagate its return code

and remove the setting err to ENODEV, it will be set to
0 again before dev_change_net_namespace exits.

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/dev.c b/net/core/dev.c
index 57b7bab..a5aa1c7 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -8643,7 +8643,8 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
                /* We get here if we can't use the current device name */
                if (!pat)
                        goto out;
-               if (dev_get_valid_name(net, dev, pat) < 0)
+               err = dev_get_valid_name(net, dev, pat);
+               if (err < 0)
                        goto out;
        }
 
@@ -8655,7 +8656,6 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
        dev_close(dev);
 
        /* And unlink it from device chain */
-       err = -ENODEV;
        unlist_netdevice(dev);
 
        synchronize_net();