Btrfs: put the right bio if we have an error

In btrfs_submit_direct_hook if the first btrfs_map_block fails we need to put
the orig_bio, not bio.
Signed-off-by: NJosef Bacik <josef@redhat.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

fs/btrfs/inode.c

@@ -6041,7 +6041,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
 	ret = btrfs_map_block(map_tree, READ, start_sector << 9,
 			      &map_length, NULL, 0);
 	if (ret) {
-		bio_put(bio);
+		bio_put(orig_bio);
 		return -EIO;
 	}