Re: WDF Bus Drivers, Hal Calls and Removing Resources

Who owns the source code of driver for child devices?

You cannot assign resources to your child devices using
EvtDeviceResourceRequirementsQuery. For this to work, you have to act as a
second-level arbiter of resources, and the interface to arbitrate resources
is not documented. So the only approach is to devise a private interface
between your bus driver and child function driver to exchange resource
information in Start-Device. I would use QueryInterface scheme to get the
information from the bus (WdfFdoQueryInterface). Toaster bus and featured
function driver demonstrate how to implement a query-interface.

-Eliyas


.

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