From: Sebastian Ott <sebott@linux.vnet.ibm.com>
Date: Wed, 26 May 2010 21:27:07 +0000 (+0200)
Subject: [S390] ccwgroup: add locking around drvdata access
X-Git-Tag: v2.6.35-rc1~34^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c560d105a197464603247bf55962fc7f23c8cb62;p=pandora-kernel.git

[S390] ccwgroup: add locking around drvdata access

Several processes may concurrently try to create a group device
from the same ccw_device(s). Add locking arround the drvdata
access to prevent race conditions.

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