[PATCH] btrfs: fix double unlock bugs in btrfs_compare_trees()

[Dan Carpenter <dan.carpenter@oracle.com>]

These error paths unlock before the goto, but the goto also unlocks
so it's a double unlock.

Fixes: 5646ffa863d0 ("btrfs: make send work with concurrent block group relocation")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 fs/btrfs/send.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 3fc144b8c0d8..1aa8a0998673 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -7152,7 +7152,6 @@ static int btrfs_compare_trees(struct btrfs_root *left_root,
 	left_path->nodes[left_level] =
 			btrfs_clone_extent_buffer(left_root->commit_root);
 	if (!left_path->nodes[left_level]) {
-		up_read(&fs_info->commit_root_sem);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -7162,7 +7161,6 @@ static int btrfs_compare_trees(struct btrfs_root *left_root,
 	right_path->nodes[right_level] =
 			btrfs_clone_extent_buffer(right_root->commit_root);
 	if (!right_path->nodes[right_level]) {
-		up_read(&fs_info->commit_root_sem);
 		ret = -ENOMEM;
 		goto out;
 	}
-- 
2.20.1