From: Tejun Heo <tj@kernel.org>
Date: Tue, 28 Apr 2009 03:38:32 +0000 (+0900)
Subject: mg_disk: fix locking
X-Git-Tag: v2.6.30-rc4~7^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=39f36b47caae1443eb37c34c6def108bb79f8d25;p=pandora-kernel.git

mg_disk: fix locking

IRQ and timeout handlers call functions which expect locked queue lock
without locking it.  Fix it.

While at it, convert 0s used as null pointer constant to NULLs.

[ Impact: fix locking, cleanup ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: unsik Kim <donari75@gmail.com>
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