[patch 25/39] [PATCH] dm: missing bdput/thaw_bdev at removal

[Chris Wright]

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

Need to unfreeze and release bdev otherwise the bdev inode with
inconsistent state is reused later and cause problem.

Signed-off-by: Jun'ichi Nomura <j-nomura@xxxxxxxxxxxxx>
Acked-by: Alasdair G Kergon <agk@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
[chrisw: backport to 2.6.15]
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
---

 drivers/md/dm.c |    4 ++++
 1 files changed, 4 insertions(+)

--- linux-2.6.15.4.orig/drivers/md/dm.c
+++ linux-2.6.15.4/drivers/md/dm.c
@@ -812,6 +812,10 @@ static struct mapped_device *alloc_dev(u
 
 static void free_dev(struct mapped_device *md)
 {
+	if (md->frozen_bdev) {
+		thaw_bdev(md->frozen_bdev, NULL);
+		bdput(md->frozen_bdev);
+	}
 	free_minor(md->disk->first_minor);
 	mempool_destroy(md->tio_pool);
 	mempool_destroy(md->io_pool);

--
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