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[NET] dev_change_name: ignore changes to same name

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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>
This commit is contained in:
Stephen Hemminger 2007-10-26 03:53:42 -07:00 committed by David S. Miller
parent 8c56a347c1
commit c8d90dca32
1 changed files with 3 additions and 0 deletions
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3
net/core/dev.c
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@ -883,6 +883,9 @@ int dev_change_name(struct net_device *dev, char *newname)
if (!dev_valid_name(newname)) if (!dev_valid_name(newname))
return -EINVAL; return -EINVAL;
if (strncmp(newname, dev->name, IFNAMSIZ) == 0)
return 0;
memcpy(oldname, dev->name, IFNAMSIZ); memcpy(oldname, dev->name, IFNAMSIZ);
if (strchr(newname, '%')) { if (strchr(newname, '%')) {