linux-kernel - Re: [PATCH] x86: EuroBraille/Iris power off

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Message-ID: <4C75AFFC.5090601@zytor.com>
Date:	Wed, 25 Aug 2010 17:06:20 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Samuel Thibault <Samuel.Thibault@...-lyon.org>,
	Sebastien Hinderer <Sebastien.Hinderer@...-lyon.org>,
	Andreas Mohr <andi@...as.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Len Brown <len.brown@...el.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: EuroBraille/Iris power off

On 08/25/2010 03:50 PM, Samuel Thibault wrote:
> H. Peter Anvin, le Wed 25 Aug 2010 14:19:55 -0700, a écrit :
>> At that point I'd almost prefer doing something like a BIOS signature
>> check if we can't do anything better.
> 
> Well, there will be several versions of the BIOS signature, which the
> constructor is not likely to provide.
> 

Then we'll gather them up, or something.

> Just to make sure there's no misunderstanding: it was never planned that
> this driver be loaded unless some manual intervention, like explicitly
> loadling the module or setting some parameter, so that if bad effects
> happen on the machine, the user can only get angry at himself for having
> loaded by hand a random module without reading the documentation that
> explicitly says (twice) it's only for a particular kind of hardware.
> 
> I however now realize that I don't find a way to force a driver to be
> compiled only as a module.  If there isn't, I guess we can just add
> a module parameter to enable/disable the driver, so that it won't be
> active by default even compiled-in?

There is, but that is hardly a reasonable solution.

What other forms of enumerable hardware is on this machine?  PCI?

	-hpa
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