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btrfs: replace the BUG_ON in btrfs_del_root_ref with proper error handling 

I hit the BUG_ON() with generic/475 test case, and to my surprise, all
callers of btrfs_del_root_ref() are already aborting transaction, thus
there is not need for such BUG_ON(), just go to @out label and caller
will properly handle the error.

CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2021-12-01 19:56:17 +08:00 committed by David Sterba
parent 5911f53820
commit 8289ed9f93
1 changed files with 2 additions and 1 deletions
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3
fs/btrfs/root-tree.c
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@ -336,7 +336,8 @@ int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
key.offset = ref_id;
again:
ret = btrfs_search_slot(trans, tree_root, &key, path, -1, 1);
BUG_ON(ret < 0);
if (ret < 0)
goto out;
if (ret == 0) {
leaf = path->nodes[0];
ref = btrfs_item_ptr(leaf, path->slots[0],