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Unloading a Miniport Driver

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The driver object that is associated with an NDIS miniport driver specifies an Unload routine. The system calls the Unload routine when all the devices that the driver services have been removed. NDIS provides the Unload routine for miniport drivers. NDIS calls a miniport driver's MiniportDriverUnload function from the Unload routine.

A miniport driver must call NdisMDeregisterMiniportDriver from MiniportDriverUnload.

A miniport driver's MiniportDriverUnload function should also release any driver-specific resources. The system will complete a driver unload operation after MiniportDriverUnload returns.

The functionality of the MiniportDriverUnload function is driver-specific. As a general rule, MiniportDriverUnload should undo the operations that were performed during driver initialization. For more information about driver initialization, see Initializing a Miniport Driver.