linux-kernel - Re: [RFC] Simple userspace interface for PCI drivers

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Message-ID: <44F74C66.7000705@nortel.com>
Date:	Thu, 31 Aug 2006 14:53:58 -0600
From:	"Chris Friesen" <cfriesen@...tel.com>
To:	Lee Revell <rlrevell@...-job.com>
CC:	Xavier Bestel <xavier.bestel@...e.fr>, Greg KH <greg@...ah.com>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC] Simple userspace interface for PCI drivers

Lee Revell wrote:

> Why?  There's no technical or legal requirement for userspace drivers to
> be GPLed.

I could see a benefit to tainting the kernel once userspace starts 
poking at the hardware directly.  That way at least we'd know that a 
crash might be due to userspace doing bad things.

For instance, consider the case where userspace misprograms a DMA 
engine, which starts overwriting random kernel memory.

Chris
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