Unloading a NetDMA Provider Driver
Note The NetDMA interface is not supported in Windows 8 and later.
The Plug and Play (PnP) manager calls a NetDMA provider driver's Unload routine after all of the dynamic memory access (DMA) engines that the driver manages have been removed. For more information about removing DMA engines, see Deregistering a NetDMA Provider.
In Unload, the NetDMA provider driver releases any resources that it allocated in its DriverEntry routine. For more information about the NetDMA provider driver's DriverEntry routine, see Initializing a NetDMA Provider Driver.