dm btree remove: fix bug in remove_one()

remove_one() was not incrementing the key for the beginning of the
range, so not all entries were being removed.  This resulted in
discards that were not unmapping all blocks.

Fixes: 4ec331c3ea ("dm btree: add dm_btree_remove_leaves()")
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/md/persistent-data/dm-btree-remove.c b/drivers/md/persistent-data/dm-btree-remove.c
index 9836c0ae897c..9ca9eccd512f 100644
--- a/drivers/md/persistent-data/dm-btree-remove.c
+++ b/drivers/md/persistent-data/dm-btree-remove.c
@@ -689,6 +689,7 @@ static int remove_one(struct dm_btree_info *info, dm_block_t root,
                                              value_ptr(n, index));
 
                 delete_at(n, index);
+                keys[last_level] = k + 1ull;
 
         } else
                 r = -ENODATA;