30 	struct device *ctrl_dev, *child;  in get_serdev_controller()  local
43 	ctrl_dev = get_device(acpi_get_first_physical_node(ctrl_adev));  in get_serdev_controller()
44 	if (!ctrl_dev) {  in get_serdev_controller()
47 		ctrl_dev = ERR_PTR(-ENODEV);  in get_serdev_controller()
55 			snprintf(name, sizeof(name), "%s:0", dev_name(ctrl_dev));  in get_serdev_controller()
59 				 dev_name(ctrl_dev), serial_ctrl_port);  in get_serdev_controller()
66 		child = device_find_child_by_name(ctrl_dev, name);  in get_serdev_controller()
67 		put_device(ctrl_dev);  in get_serdev_controller()
70 			ctrl_dev = ERR_PTR(-ENODEV);  in get_serdev_controller()
74 		ctrl_dev = child;  in get_serdev_controller()
79 	return ctrl_dev;  in get_serdev_controller()