From 7cd403142d5dbffa354b7dd369b1069e01b1ae19 Mon Sep 17 00:00:00 2001
From: Sebastian Ott <sebott@linux.vnet.ibm.com>
Date: Mon, 9 Aug 2010 18:12:52 +0200
Subject: [PATCH] [S390] cio: ccw_device_online_store return -EINVAL in case of
 missing driver

If no driver is attached to a device or the driver provides no
set_online/set_offline function, setting this device online/offline
via its sysfs online attribute will silently fail but return success.

This patch changes the behavior to return -EINVAL in those cases.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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