usb_get_hub_port_acpi_handle
port_handle = (acpi_handle) usb_get_hub_port_acpi_handle(hdev, port1);
parent_handle = usb_get_hub_port_acpi_handle(udev->parent,
port_handle = usb_get_hub_port_acpi_handle(hdev,
port_handle = usb_get_hub_port_acpi_handle(hdev, port1);
extern acpi_handle usb_get_hub_port_acpi_handle(struct usb_device *hdev,