Date: Sun, 30 Dec 2007 21:31:14 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: 7eggert@gmx.de, Ingo Molnar <mingo@elte.hu>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Rene Herman <rene.herman@keyaccess.nl>, dpreed@reed.com,
       Islam Amer <pharon@gmail.com>, Pavel Machek <pavel@ucw.cz>,
       Ingo Molnar <mingo@redhat.com>, Andi Kleen <andi@firstfloor.org>,
       Thomas Gleixner <tglx@linutronix.de>,
       Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override
Message-ID: <20071230213114.25139163@the-village.bc.nu>
In-Reply-To: <4778052E.8000808@zytor.com>
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On Sun, 30 Dec 2007 12:53:02 -0800
"H. Peter Anvin" <hpa@zytor.com> wrote:

> Bodo Eggert wrote:
> > 
> > I've never seen code which would do that, and it was not suggested by any
> > tutorial I ever saw. I'd expect any machine to break on all kinds of software
> > if it required this. The only thing I remember being warned about is writing
> > the index and the data register at the same time using outw, because that
> > would write both registers at the same time on 16-bit-cards.
> > 
> 
> And we use that, and have been for 15 years.  I haven't seen any screams 
> of pain about it.

Actually there were, and I sent numerous people patches for that back in
ISA days. 

Alan
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