Calling validate server on devices in offline processing may cause
an OOPS in the dasd_sleep_on function.
Signed-off-by: NStefan Haberland <stefan.haberland@de.ibm.com>
Reviewed-by: NStefan Weinhuber <wein@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>