Miniport Adapter Shutdown
An NDIS miniport driver must register a MiniportShutdownEx function during miniport driver initialization.
NDIS calls an NDIS miniport driver's MiniportShutdownEx function when the system is shutting down. MiniportShutdownEx restores the hardware to a known state.
The ShutdownAction parameter that NDIS passed to MiniportShutdownEx informs the miniport driver of the reason for the shutdown.
The shutdown handler can be called as a result of a user operation, in which case it runs at IRQL = PASSIVE_LEVEL. It can also be called as a result of an unrecoverable system error, in which case it can be running at any IRQL.
MiniportShutdownEx should call no NdisXxx functions. The miniport driver can call functions for reading and writing I/O ports or disabling the DMA engine to return the hardware to a known state.
Unlike MiniportHaltEx, MiniportShutdownEx should not release any allocated resources. MiniportShutdownEx should just stop the NIC.
Related topics
Adapter States of a Miniport Driver