linux-kernel - Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.

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Message-ID: <20071215225538.GC2434@elf.ucw.cz>
Date:	Sat, 15 Dec 2007 23:55:38 +0100
From:	Pavel Machek <pavel@....cz>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Paul Rolland <rol@...917.net>, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ingo Molnar <mingo@...e.hu>, "David P. Reed" <dpreed@...d.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Rene Herman <rene.herman@...access.nl>, rol@...be.net
Subject: Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80
	on some AMD64x2 laptops, etc.

On Sat 2007-12-15 12:26:26, H. Peter Anvin wrote:
> Paul Rolland wrote:
>> Just an idea : from what I've read, the problem (port 80 hanging) only 
>> occurs
>> on 'modern' machines...
>
> It happens on *one single* "modern" machine...
>
> Let's keep that in perspective.

it hurts on other machines (like debug leds being useless), and it may
be incorrect as soon as you insert leds-on-port-0x80-on-PCI card.

No, it is not critical but yes, I'd like to see it fixed.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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