Date: Wed, 09 Jan 2008 18:37:55 -0600
From: Robert Hancock <hancockr@shaw.ca>
Subject: Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port 0x80 I/O
 delay override.
In-reply-to: <fa.97XrGLIGlvAy4P/TB5vHHrfBrIw@ifi.uio.no>
To: "David P. Reed" <dpreed@reed.com>
Cc: Christer Weinigel <christer@weinigel.se>, Zachary Amsden <zach@vmware.com>,
       Avi Kivity <avi@quramnet.com>, Ondrej Zary <linux@rainbow-software.org>,
       "H. Peter Anvin" <hpa@zytor.com>,
       Rene Herman <rene.herman@keyaccess.nl>, Bodo Eggert <7eggert@gmx.de>,
       Ingo Molnar <mingo@elte.hu>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Paul Rolland <rol@as2917.net>, Pavel Machek <pavel@ucw.cz>,
       Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org,
       Ingo Molnar <mingo@redhat.com>, rol <rol@witbe.net>
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David P. Reed wrote:
> Christer Weinigel wrote:
>>
>> Did I miss anyting?
>>
>>   
> Nothing that seems *crucial* going forward for Linux.  The fate of
> "legacy machines" is really important to get right.
> 
> I have a small suggestion in mind that might be helpful in the future:
> the  "motherboard resources" discovered as PNP0C02 devices in their _CRS
> settings in ACPI during ACPI PnP startup should be reserved (or
> checked), and any drivers that still use port 80 implicitly should
> reserve that port.

I agree. In this case the BIOS on these laptops is trying to tell us 
"port 80 is used for our purposes, do not touch it". We should be listening.

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

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