HP 752c (US/CAN) manual Windows 2000 White Paper

device, providing the signal to the bus driver that it needs to re-enumerate its devices. Good system design provides for selective notification on wake-up rather that requiring the entire system to re-enumerate devices.

The PDO created by the underlying bus driver is always at the bottom of the device stack for a particular device. When a driver handles a Plug and Play IRPs, it must pass the IRP all the way down the device stack to the PDO and its associated bus driver.