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@ce.jp.nec.com>

--- linux-2.6.15.orig/drivers/md/dm.c	2006-02-23 18:28:23.000000000 -0500
+++ linux-2.6.15/drivers/md/dm.c	2006-02-23 18:29:04.000000000 -0500
@@ -812,6 +812,10 @@ static struct mapped_device *alloc_dev(u
 
 static void free_dev(struct mapped_device *md)
 {
+	if (md->suspended_bdev) {
+		thaw_bdev(md->suspended_bdev, NULL);
+		bdput(md->suspended_bdev);
+	}
 	free_minor(md->disk->first_minor);
 	mempool_destroy(md->tio_pool);
 	mempool_destroy(md->io_pool);