dm persistent data: fix nested btree deletion

When deleting nested btrees, the code forgets to delete the innermost
btree.  The thin-metadata code serendipitously compensates for this by
claiming there is one extra layer in the tree.

This patch corrects both problems.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 693e149e9727..4d6e85367b84 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -408,7 +408,7 @@ static void __setup_btree_details(struct dm_pool_metadata *pmd)
 
         pmd->tl_info.tm = pmd->tm;
         pmd->tl_info.levels = 1;
-        pmd->tl_info.value_type.context = &pmd->info;
+        pmd->tl_info.value_type.context = &pmd->bl_info;
         pmd->tl_info.value_type.size = sizeof(__le64);
         pmd->tl_info.value_type.inc = subtree_inc;
         pmd->tl_info.value_type.dec = subtree_dec;