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authorStephen Hemminger <shemminger@linux-foundation.org>2007-10-26 03:53:42 -0700
committerDavid S. Miller <davem@davemloft.net>2007-10-26 03:53:42 -0700
commitc8d90dca3211966ba5189e0f3d4bccd558d9ae08 (patch)
tree37df506f4905cf5a4dbd64c0680d8b98e9166c4b
parent8c56a347c1dfbe384b1ffb65d8828faa36dbaea4 (diff)
[NET] dev_change_name: ignore changes to same name
Prevent error/backtrace from dev_rename() when changing name of network device to the same name. This is a common situation with udev and other scripts that bind addr to device. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/core/dev.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index f1647d7dd14..ddfef3b45ba 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -883,6 +883,9 @@ int dev_change_name(struct net_device *dev, char *newname)
if (!dev_valid_name(newname))
return -EINVAL;
+ if (strncmp(newname, dev->name, IFNAMSIZ) == 0)
+ return 0;
+
memcpy(oldname, dev->name, IFNAMSIZ);
if (strchr(newname, '%')) {