linux-kernel - [ 89/95] dm thin metadata: unlock superblock in init

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Date:	Fri, 09 Mar 2012 11:03:31 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Joe Thornber <ejt@...hat.com>,
	Mike Snitzer <snitzer@...hat.com>,
	Alasdair G Kergon <agk@...hat.com>
Subject: [ 89/95] dm thin metadata: unlock superblock in init_pmd error path

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joe Thornber <ejt@...hat.com>

commit 4469a5f387fdde956894137751a41473618a4a52 upstream.

If dm_sm_disk_create() fails the superblock must be unlocked.

Signed-off-by: Joe Thornber <ejt@...hat.com>
Acked-by: Mike Snitzer <snitzer@...hat.com>
Signed-off-by: Alasdair G Kergon <agk@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/md/dm-thin-metadata.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -385,6 +385,7 @@ static int init_pmd(struct dm_pool_metad
 		data_sm = dm_sm_disk_create(tm, nr_blocks);
 		if (IS_ERR(data_sm)) {
 			DMERR("sm_disk_create failed");
+			dm_tm_unlock(tm, sblock);
 			r = PTR_ERR(data_sm);
 			goto bad;
 		}


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