tree 7f4870224b54121fbfea83cd77ea41f7ab3a00d8
parent 3c522cedb572bb8d2e4867f358bdaa7d0c53d88c
author Miklos Szeredi <mszeredi@suse.cz> 1298558993 +0100
committer Linus Torvalds <torvalds@linux-foundation.org> 1298566501 -0800

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>