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From: francois on 29 Mar 2008 03:49
On Mar 28, 11:49 pm, "Doron Holan [MSFT]"
<dor...(a)online.microsoft.com> wrote:
> this has nothing to do with the DeviceObjectExtension. For this property to
> be returned, IRP_MJ_PNP/IRP_MN_QUERY_BUS_INFORMATION must be supported by
> the bus driver. I am asking the usbccgp owner if it supports this function
> on vista.
>
> d
>


Thank you Doron. On Vista, everything works fine. The problem occurs
on Windows 2000 only.
From: francois on 31 Mar 2008 06:53
I tried to pull DevicePropertyDeviceDescription instead of
DevicePropertyBusTypeGuid, and IoGetDeviceProperty returned
STATUS_SUCCESS.
This confirms DevicePropertyBusTypeGuid is maybe not handled by USBHUB
parent driver.



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