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net: wan: sbni: fix device usage count 

dev_get_by_name() will increment the usage count if the matching device
is found. But we were not decrementing the count if we have got the
device and the device is non-active.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sudip Mukherjee 2015-09-03 11:30:30 +05:30 committed by David S. Miller
parent 25b4a44c19
commit bd516bd1fe
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wan/sbni.c
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@ -1358,6 +1358,8 @@ sbni_ioctl( struct net_device *dev, struct ifreq *ifr, int cmd )
if( !slave_dev || !(slave_dev->flags & IFF_UP) ) {
netdev_err(dev, "trying to enslave non-active device %s\n",
slave_name);
if (slave_dev)
dev_put(slave_dev);
return -EPERM;
}