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

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Message-ID: <SNT125-W19B1FC8CF2BAD793767B91C3E00@phx.gbl>
Date:	Mon, 17 May 2010 08:10:48 -0700
From:	Yuhong Bao <yuhongbao_386@...mail.com>
To:	<andreas.herrmann3@....com>
CC:	<venkatesh.pallipadi@...el.com>, <markh@...pro.net>,
	<dmarkh@....rr.com>, <andi@...stfloor.org>,
	<torvalds@...ux-foundation.org>, <alain@...ff.lu>,
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] x86: Disable HPET MSI on ATI SB700/SB800

> The suggested workaround for this is to disable HPET MSI if LPC
> devices are used. I doubt that there is a convenient way for Linux to
> find out whether LPC devices are used.And don't forget that the Super I/O chip in most motherboards is an LPC device!(In fact, that was what LPC was invented for)
> Thus I think the only solution
> to safely avoid the problem is the currently implemented quirk to
> disable HPET MSI on this chipset.
Yuhong Bao

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