linux-kernel - Re: [PATCHv5 2/3] USB: gadget: Use new composite features in some gadgets

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Date:	Sat, 31 Jul 2010 07:58:19 +0800
From:	Xiaofan Chen <xiaofanc@...il.com>
To:	David Brownell <david-b@...bell.net>
Cc:	Greg KH <greg@...ah.com>,
	Michał Nazarewicz <m.nazarewicz@...sung.com>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dries Van Puymbroeck <Dries.VanPuymbroeck@...imo.com>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: [PATCHv5 2/3] USB: gadget: Use new composite features in some 
	gadgets

On Sat, Jul 31, 2010 at 6:01 AM, David Brownell <david-b@...bell.net> wrote:
>> Or does Windows really care about the vid/pid for
>> a class device somehow?
>
> My understanding is that it does, since it really
> doesn't have a good concept of "class" being the
> generic thing.  INF files embed VIDS/PIDS even
> for drivers implementing class specs.  MSFT was
> being stupid again...
>

It depends. For Mass Storage device and HID device,
no INF file is needed. So the VID/PID really does not
matter for them. For CDC-ACM or USB RNDIS,
an INF is needed.


-- 
Xiaofan
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