diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a7e6690..5b892500 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -864,7 +864,8 @@
 
 	if (btrfs_is_free_space_inode(inode)) {
 		WARN_ON_ONCE(1);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out_unlock;
 	}
 
 	num_bytes = ALIGN(end - start + 1, blocksize);