From: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Date: Thu, 21 Aug 2008 17:46:40 +0000 (+0200)
Subject: [S390] dcssblk: fix race in dcssblk_add_store()
X-Git-Tag: v2.6.27-rc5~57
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04f64b5756872b474d9429e3b6987ada10bb8012;p=pandora-kernel.git

[S390] dcssblk: fix race in dcssblk_add_store()

Concurrently adding the same segment may lead to duplicate device_register()
calls, which will trigger an error in kobject code:
"... don't try to register things with the same name in the same directory".
This patch adds a check to avoid this.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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