btrfs: use BTRFS_PATH_AUTO_FREE in btrfs_lookup_extent_info()

This is the trivial pattern for path auto free, initialize at the
beginning and free at the end with simple goto -> return conversions.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index ea440b87a013d32ae2683e0bb119b84f0852666b..6e82d627f12cf75c8d7e9f6407e96c5b9fcc3f01 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -100,7 +100,7 @@ int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
        struct btrfs_root *extent_root;
        struct btrfs_delayed_ref_head *head;
        struct btrfs_delayed_ref_root *delayed_refs;
-       struct btrfs_path *path;
+       BTRFS_PATH_AUTO_FREE(path);
        struct btrfs_key key;
        u64 num_refs;
        u64 extent_flags;
@@ -131,7 +131,7 @@ search_again:
        extent_root = btrfs_extent_root(fs_info, bytenr);
        ret = btrfs_search_slot(NULL, extent_root, &key, path, 0, 0);
        if (ret < 0)
-               goto out_free;
+               return ret;
 
        if (ret > 0 && key.type == BTRFS_METADATA_ITEM_KEY) {
                if (path->slots[0]) {
@@ -156,7 +156,7 @@ search_again:
                        "unexpected extent item size, has %u expect >= %zu",
                                  item_size, sizeof(*ei));
                        btrfs_abort_transaction(trans, ret);
-                       goto out_free;
+                       return ret;
                }
 
                ei = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
@@ -167,7 +167,7 @@ search_again:
                "unexpected zero reference count for extent item (%llu %u %llu)",
                                  key.objectid, key.type, key.offset);
                        btrfs_abort_transaction(trans, ret);
-                       goto out_free;
+                       return ret;
                }
                extent_flags = btrfs_extent_flags(leaf, ei);
                owner = btrfs_get_extent_owner_root(fs_info, leaf, path->slots[0]);
@@ -213,8 +213,7 @@ search_again:
                *flags = extent_flags;
        if (owning_root)
                *owning_root = owner;
-out_free:
-       btrfs_free_path(path);
+
        return ret;
 }