[PATCH v2 1/4] btrfs: don't set @return_any for btrfs_search_slot_for_read in btrfs_read_qgroup_config

[Sun YangKai <sunk67188@gmail.com>]

The call to `btrfs_search_slot_for_read` in `btrfs_read_qgroup_config` is
intended to find the very first item in the quota root tree to initiate
iteration.

The search key is set to all zeros: (0, 0, 0).

The current call uses `return_any=1`:
`btrfs_search_slot_for_read(..., find_higher=1, return_any=1)`

With `find_higher=1`, the function searches for an item greater than
(0, 0, 0). The `return_any=1` flag provides a fallback: if no higher item
is found, it attempts to return the next lower item instead.

Since the search key (0, 0, 0) represents the absolute floor of the btrfs
key space (u64 objectid), there can be no valid key lower than it. The
`return_any` fallback logic is therefore pointless and misleading in
this context.

Change `return_any` from `1` to `0` to correctly express the intention:
find the first item strictly higher than (0, 0, 0), and if no such item
exists, simply return 'not found' (1) without attempting an unnecessary
and impossible search for a lower key.

Signed-off-by: Sun YangKai <sunk67188@gmail.com>
---
 fs/btrfs/qgroup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 9e2b53e90dcb..d780980e6790 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -415,7 +415,7 @@ int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info)
 	key.objectid = 0;
 	key.type = 0;
 	key.offset = 0;
-	ret = btrfs_search_slot_for_read(quota_root, &key, path, 1, 1);
+	ret = btrfs_search_slot_for_read(quota_root, &key, path, 1, 0);
 	if (ret)
 		goto out;
 
-- 
2.51.2