base/power/qos.c

622  * dev_pm_qos_add_ancestor_request - Add PM QoS request for device's ancestor.
623  * @dev: Device whose ancestor to add the request for.
632 	struct device *ancestor = dev->parent;
637 		while (ancestor && !ancestor->power.ignore_children)
638 			ancestor = ancestor->parent;
642 		while (ancestor && !ancestor->power.set_latency_tolerance)
643 			ancestor = ancestor->parent;
647 		ancestor = NULL;
649 	if (ancestor)
650 		ret = dev_pm_qos_add_request(ancestor, req, type, value);