Name
ccw_device_set_online — 
     enable a ccw device for I/O
 
Synopsis
| int ccw_device_set_online ( | struct ccw_device * cdev ); | 
 
Description
   This function first enables cdev and then calls the driver's set_online
   function for cdev, if given. If set_online returns an error, cdev is
   disabled again.
Returns
   0 on success and a negative error value on failure.
Context
   enabled, ccw device lock not held