UMDF can be lower filter of USB device

NTDEV
1

Hi,

I have one question regarding to the UMDF driver for USB Device.

The USB device has an USB INput device and HID device. I used to write a KMDF lower filter driver of the USB Input device and it works fine until now. However, can I do the same thing using the UMDF?

Thanks,
Marshall

2

No, you can’t have a lower filter umdf driver below a km stack

Bent from my phone

From: xxxxx@lists.osr.com on behalf of xxxxx@hotmail.com xxxxx@lists.osr.com
Sent: Monday, August 7, 2017 2:26:46 AM
To: Windows System Software Devs Interest List
Subject: [ntdev] UMDF can be lower filter of USB device

Hi,

I have one question regarding to the UMDF driver for USB Device.

The USB device has an USB INput device and HID device. I used to write a KMDF lower filter driver of the USB Input device and it works fine until now. However, can I do the same thing using the UMDF?

Thanks,
Marshall

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