Btrfs: Fix a few functions that exit without stopping their transaction

Signed-off-by: NChris Mason <chris.mason@oracle.com>

fs/btrfs/extent-tree.c

@@ -3275,8 +3275,10 @@ int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 shrink_start)
 	ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
 	if (ret > 0)
 		ret = -EIO;
-	if (ret < 0)
+	if (ret < 0) {
+		btrfs_end_transaction(trans, root);
 		goto out;
+	}
 
 	clear_extent_bits(&info->block_group_cache, key.objectid,
 			  key.objectid + key.offset - 1,

fs/btrfs/ioctl.c

@@ -78,8 +78,10 @@ static noinline int create_subvol(struct btrfs_root *root, char *name,
 	leaf = btrfs_alloc_free_block(trans, root, root->leafsize,
 				      objectid, trans->transid, 0, 0,
 				      0, 0);
-	if (IS_ERR(leaf))
-		return PTR_ERR(leaf);
+	if (IS_ERR(leaf)) {
+		ret = PTR_ERR(leaf);
+		goto fail;
+	}
 
 	btrfs_set_header_nritems(leaf, 0);
 	btrfs_set_header_level(leaf, 0);