From: Sebastian Ott <sebott@linux.vnet.ibm.com>
Date: Mon, 7 Dec 2009 11:51:37 +0000 (+0100)
Subject: [S390] cio: handle busy subchannel in ccw_device_move_to_sch
X-Git-Tag: v2.6.33-rc1~349^2~48
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c609fca243d456af014e92ad1caca045072dfe8;p=pandora-kernel.git

[S390] cio: handle busy subchannel in ccw_device_move_to_sch

Try to disable the old subchannel before we ask the driver core
to move the attached device to a new parent. This way we can use
the QUIESCE state during shutdown which prevents a possible use
after free situation in some error cases.

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