diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index f74dc259307b..9a76e7671938 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -3166,8 +3166,8 @@ static int do_trimming(struct btrfs_block_group_cache *block_group,
 			space_info->bytes_readonly += reserved_bytes;
 		block_group->reserved -= reserved_bytes;
 		space_info->bytes_reserved -= reserved_bytes;
-		spin_unlock(&space_info->lock);
 		spin_unlock(&block_group->lock);
+		spin_unlock(&space_info->lock);
 	}
 
 	return ret;