From: Cornelia Huck <cornelia.huck@de.ibm.com>
Date: Sat, 26 Jan 2008 13:10:50 +0000 (+0100)
Subject: [S390] cio: Fix ungroup vs. machine check race in ccwgroup.
X-Git-Tag: v2.6.25-rc1~1228^2~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1a908c735aed44c8bbed303371202e416813b271;p=pandora-kernel.git

[S390] cio: Fix ungroup vs. machine check race in ccwgroup.

There are two ways for a ccwgroup device to be unregistered:
Via the ungroup attribute, or when on of the slave devices is killed
by a machine check. As we have to unregister the ccwgroup device
via a callback, we'll now have to check whether it hasn't been
already unregistered because of a machine check.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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