diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 646152f30584..a202f2f12b1c 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -3016,8 +3016,11 @@ reserve_space:
 			goto out;
 		ret = btrfs_qgroup_reserve_data(inode, &data_reserved,
 						alloc_start, bytes_to_reserve);
-		if (ret)
+		if (ret) {
+			unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart,
+					     lockend, &cached_state);
 			goto out;
+		}
 		ret = btrfs_prealloc_file_range(inode, mode, alloc_start,
 						alloc_end - alloc_start,
 						i_blocksize(inode),