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windowsdriverkmdfnt

KMDF: Handling IRQ

We need to handle IRQ in KMDF driver

I've registered EVT_WDF_DEVICE_RESOURCE_REQUIREMENTS_QUERY callback function but system does not call it.

EVT_WDF_DEVICE_PREPARE_HARDWARE is called without any resources allocated. Attempt to call WdfInterruptCreate() here results STATUS_INVALID_DEVICE_STATE

What is the right way to get free IRQ number from system and attach an interrupt handler?

Upd:

After we have successfully created WDFINTERRUPT object in our AddDevice handler system still does not ask us about resources (EVT_WDF_DEVICE_RESOURCE_REQUIREMENTS_QUERY)

Solution

  • After discussion on social.msdn.microsoft.com we've found only one solution: use another OS