From: Jan Glauber <jang@linux.vnet.ibm.com>
Date: Fri, 9 Jan 2009 11:14:55 +0000 (+0100)
Subject: [S390] qdio: fix broken pointer in case of CONFIG_DEBUG_FS is disabled
X-Git-Tag: v2.6.29-rc1~24^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19cdd08ba155dd87ebb87bb39ed097dbee671e0e;p=pandora-kernel.git

[S390] qdio: fix broken pointer in case of CONFIG_DEBUG_FS is disabled

If CONFIG_DEBUG_FS is disabled debugfs_create_file returns -ENODEV instead
of zero. Since the return value is stored and used at shutdown to remove
existing entries an OOPS may be triggered.

Add a check of the debugfs_create_file return value and in case of an error
set the entry to NULL so it will be ignored at shutdown.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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