linux-kernel - Re: [PATCH 1/4] x86: base support for the TS-5500 platform

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Message-ID: <20110824183814.64abc94c@v0nbox>
Date:	Wed, 24 Aug 2011 18:38:14 -0400
From:	Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To:	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Cc:	x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH 1/4] x86: base support for the TS-5500 platform

On Wed, 24 Aug 2011 15:10:23 -0700,
"H. Peter Anvin" <hpa@...or.com> wrote:

> On 08/24/2011 03:08 PM, Vivien Didelot wrote:
> > Indeed this will be run on any Elan SC520 based platforms if the
> > user has asked for TS-5500 support in the menuconfig. I could add
> > checks for other hardware such as the Ethernet controller, but it
> > would require including pci headers and delaying the initcall
> > (using late_initcall instead of postcore_initcall).
> > That's why I think it is not really worth adding more tests. They
> > could be added later in this function if there is really a need.
> > 
> > Regards,
> > Vivien.
> 
> Hello?  HELLO?
> 
> We do not break unrelated hardware just because something is enabled
> at compile time.
> 
> EVER.
> 
> 	-hpa

I agree with you. The platform does not provide many identification
points. We have specific hardware such as the CPU, Ethernet, Cardbus
and USB controllers; there is no DMI available; no PCI bridge subvendor
info, only the BIOS provides a 16-bit identification call...
We discussed that point in https://lkml.org/lkml/2011/5/4/437 without
success.

What would be the proper way in your opinion?

Vivien.
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