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I have driver that registered as upper filter for USB bus (36fc9e60-c465-11cf-8056-444553540000).
In IRP_MN_QUERY_DEVICE_RELATIONS/BusRelations dispatch I attach to devices reported by bus with IoAttachDeviceToDeviceStack.
This works in practice.
My question is: is that approach theoretically valid considering Windows PnP architecture ?
Thank you !
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