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From: Hans Petter Selasky <hselasky@c2i.net>
To: Rink Springer <rink@freebsd.org>
Date: Sun, 9 Nov 2008 17:11:30 +0100
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Cc: usb@freebsd.org, freebsd-usb@freebsd.org
Subject: Re: Patch to convert usb2 to use cdev
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Hi Rick,

> but why would you ever want to be able 
> to read/write the same endpoint from multiple processes?
>

The control endpoint is a special endpoint which is shared and might be 
accessed from multiple process. Else you are right that only one process 
should access and endpoint at a time.

--HPS