Re: Merging ugen into the usb stack

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

> Date: Mon, 11 Dec 2017 12:44:32 +0100
> From: Martin Husemann <martin%duskware.de@localhost>
> 
> I could hack uftdi to allow attaching a ugen child, but that sounds
> like a very special hack. Jared suggested to instead make ugen not a
> separate device, but globaly fold it into the usb stack. That would
> also solve similar issues we have seen with usb scanner devices and
> ulpts.

Sounds reasonable as long as we clearly define the semantics of
opening the ugen device as it affects any other usage of the device,
and as long as Someone^TM takes the time to carefully implement that
semantics.