Name
dev_close — 
     shutdown an interface.
 
Synopsis
| int dev_close ( | struct net_device * dev ); | 
 
Description
   This function moves an active device into down state. A
   NETDEV_GOING_DOWN is sent to the netdev notifier chain. The device
   is then deactivated and finally a NETDEV_DOWN is sent to the notifier
   chain.