usb_phy_roothub_notify_disconnect
usb_phy_roothub_notify_disconnect(hcd->phy_roothub, port1 - 1);
EXPORT_SYMBOL_GPL(usb_phy_roothub_notify_disconnect);
int usb_phy_roothub_notify_disconnect(struct usb_phy_roothub *phy_roothub, int port);