CCW_DEVICE_CLEAR(9)                        The ccw bus                        CCW_DEVICE_CLEAR(9)



NAME
       ccw_device_clear - terminate I/O request processing

SYNOPSIS
       int ccw_device_clear(struct ccw_device * cdev, unsigned long intparm);

ARGUMENTS
       cdev
           target ccw device

       intparm
           interruption parameter; value is only used if no I/O is outstanding, otherwise the
           intparm associated with the I/O request is returned

DESCRIPTION
       ccw_device_clear calls csch on cdev's subchannel.

RETURN
       0 on success, -ENODEV on device not operational, -EINVAL on invalid device state.

CONTEXT
       Interrupts disabled, ccw device lock held

AUTHOR
       Cornelia Huck <cornelia.huck AT de.com>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                       CCW_DEVICE_CLEAR(9)