linux-kernel - Re: [RFC] vtunerc: virtual DVB device - is it ok to NACK driver because of worrying about possible misusage?

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Message-ID: <20111206111829.GB17194@sirena.org.uk>
Date:	Tue, 6 Dec 2011 11:18:30 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Andreas Oberritter <obi@...uxtv.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	HoP <jpetrous@...il.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC] vtunerc: virtual DVB device - is it ok to NACK driver
 because of worrying about possible misusage?

On Mon, Dec 05, 2011 at 10:20:03PM +0100, Andreas Oberritter wrote:
> On 05.12.2011 21:55, Alan Cox wrote:
> > The USB case is quite different because your latency is very tightly
> > bounded, your dead device state is rigidly defined, and your loss of
> > device is accurately and immediately signalled.

> > Quite different.

> How can usbip work if networking and usb are so different and what's so
> different between vtunerc and usbip, that made it possible to put usbip
> into drivers/staging?

USB-IP is a hack that will only work well on a tightly bounded set of
networks - if you run it over a lightly loaded local network it can
work adequately.  This starts to break down as you vary the network
configuration.
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