From: Joe Thornber <ejt@redhat.com>
Date: Wed, 7 Mar 2012 19:09:44 +0000 (+0000)
Subject: dm thin metadata: decrement counter after removing mapped block
X-Git-Tag: v3.2.10~7
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=73b249403dcb121671bb1f5df101e9ee59b31160;p=karo-tx-linux.git

dm thin metadata: decrement counter after removing mapped block

commit af63bcb817cf708f53bcae6edc2e3fb7dd7d8051 upstream.

Correct the number of mapped sectors shown on a thin device's
status line by decrementing td->mapped_blocks in __remove() each time
a block is removed.

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

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 05b7ffc030ed..237571af77fd 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -1224,6 +1224,8 @@ static int __remove(struct dm_thin_device *td, dm_block_t block)
 	if (r)
 		return r;
 
+	td->mapped_blocks--;
+	td->changed = 1;
 	pmd->need_commit = 1;
 
 	return 0;