1 files changed, 24 insertions, 11 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c
index cc29bbf3eabb..1644beb7a745 100644
--- a/drivers/gpu/drm/ttm/ttm_resource.c
+++ b/drivers/gpu/drm/ttm/ttm_resource.c
@@ -83,6 +83,23 @@ static void ttm_bulk_move_drop_cursors(struct ttm_lru_bulk_move *bulk)
 }
 
 /**
+ * ttm_resource_cursor_init() - Initialize a struct ttm_resource_cursor
+ * @cursor: The cursor to initialize.
+ * @man: The resource manager.
+ *
+ * Initialize the cursor before using it for iteration.
+ */
+void ttm_resource_cursor_init(struct ttm_resource_cursor *cursor,
+			      struct ttm_resource_manager *man)
+{
+	cursor->priority = 0;
+	cursor->man = man;
+	ttm_lru_item_init(&cursor->hitch, TTM_LRU_HITCH);
+	INIT_LIST_HEAD(&cursor->bulk_link);
+	INIT_LIST_HEAD(&cursor->hitch.link);
+}
+
+/**
  * ttm_resource_cursor_fini() - Finalize the LRU list cursor usage
  * @cursor: The struct ttm_resource_cursor to finalize.
  *
@@ -612,7 +629,6 @@ ttm_resource_cursor_check_bulk(struct ttm_resource_cursor *cursor,
 /**
  * ttm_resource_manager_first() - Start iterating over the resources
  * of a resource manager
- * @man: resource manager to iterate over
  * @cursor: cursor to record the position
  *
  * Initializes the cursor and starts iterating. When done iterating,
@@ -621,17 +637,16 @@ ttm_resource_cursor_check_bulk(struct ttm_resource_cursor *cursor,
  * Return: The first resource from the resource manager.
  */
 struct ttm_resource *
-ttm_resource_manager_first(struct ttm_resource_manager *man,
-			   struct ttm_resource_cursor *cursor)
+ttm_resource_manager_first(struct ttm_resource_cursor *cursor)
 {
-	lockdep_assert_held(&man->bdev->lru_lock);
+	struct ttm_resource_manager *man = cursor->man;
 
-	cursor->priority = 0;
-	cursor->man = man;
-	ttm_lru_item_init(&cursor->hitch, TTM_LRU_HITCH);
-	INIT_LIST_HEAD(&cursor->bulk_link);
-	list_add(&cursor->hitch.link, &man->lru[cursor->priority]);
+	if (WARN_ON_ONCE(!man))
+		return NULL;
+
+	lockdep_assert_held(&man->bdev->lru_lock);
 
+	list_move(&cursor->hitch.link, &man->lru[cursor->priority]);
 	return ttm_resource_manager_next(cursor);
 }
 
@@ -667,8 +682,6 @@ ttm_resource_manager_next(struct ttm_resource_cursor *cursor)
 		ttm_resource_cursor_clear_bulk(cursor);
 	}
 
-	ttm_resource_cursor_fini(cursor);
-
 	return NULL;
 }