From: Miklos Szeredi <mszeredi@suse.cz>
Date: Thu, 24 Feb 2011 14:49:53 +0000 (+0100)
Subject: mm: fix refcounting in swapon
X-Git-Tag: v2.6.38-rc7~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8074b26f67165bf045d92e778c9c10dc5e207fc6;p=pandora-kernel.git

mm: fix refcounting in swapon

Grab a reference to bdev before calling blkdev_get(), which expects
the refcount to be already incremented and either returns success or
decrements the refcount and returns an error.

The bug was introduced by e525fd89 (block: make blkdev_get/put()
handle exclusive access), which didn't take into account this behavior
of blkdev_get().

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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