linux-kernel - Re: [PATCH] x86: Disable HPET MSI on ATI SB700/SB800

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Message-ID: <20100125171059.GB5041@alberich.amd.com>
Date:	Mon, 25 Jan 2010 18:10:59 +0100
From:	Andreas Herrmann <andreas.herrmann3@....com>
To:	Yuhong Bao <yuhongbao_386@...mail.com>
CC:	venkatesh.pallipadi@...el.com, markh@...pro.net, dmarkh@....rr.com,
	andi@...stfloor.org,
	Linus Torvalds <torvalds@...ux-foundation.org>, alain@...ff.lu,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: Disable HPET MSI on ATI SB700/SB800

On Fri, Jan 22, 2010 at 11:21:06PM -0800, Yuhong Bao wrote:
> 
> > HPET MSI on platforms with ATI SB700/SB800 as they seem to have some
> > side-effects on floppy DMA. Do not use HPET MSI on such platforms.

Argh, will see what information I can find about this problem ...

> I think somebody from AMD should review the situation.Clearly
  something is happening inside their southbridge.CCing Andreas
  Herrmann from AMD.

I have the feeling that this problem should rather be fixed with a DMI
quirk instead of disabling HPET MSI for the entire chipset.

Was the latest available BIOS installed on the affected system?


Thanks,
Andreas

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