CCW_DEVICE_HALT(9)                         The ccw bus                         CCW_DEVICE_HALT(9)



NAME
       ccw_device_halt - halt I/O request processing

SYNOPSIS
       int ccw_device_halt(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_halt calls hsch on cdev's subchannel.

RETURN
       0 on success, -ENODEV on device not operational, -EINVAL on invalid device state, -EBUSY
       on device busy or interrupt pending.

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_HALT(9)