From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Date: Thu, 25 Dec 2008 12:39:04 +0000 (+0100)
Subject: [S390] cio: fix ccwgroup online vs. ungroup race condition
X-Git-Tag: v2.6.29-rc1~584^2~51
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c619d4223eaa063dd15ce44235b04487235f8cb7;p=pandora-kernel.git

[S390] cio: fix ccwgroup online vs. ungroup race condition

Ensure atomicity of ungroup operation to prevent concurrent ungroup
and online processing which may lead to use-after-release situations.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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