Btrfs: pass the correct root to lookup_free_space_inode()

Free space items are located in tree of tree roots, not in the extent
tree.  It didn't pop up because lookup_free_space_inode() grabs the
inode all the time instead of actually searching the tree.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 4eb7d2ba38f8..6cfcc9060c83 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7312,7 +7312,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
                 goto out;
         }
 
-        inode = lookup_free_space_inode(root, block_group, path);
+        inode = lookup_free_space_inode(tree_root, block_group, path);
         if (!IS_ERR(inode)) {
                 ret = btrfs_orphan_add(trans, inode);
                 BUG_ON(ret);