linux-kernel - Re: [PATCH] pci-quirks: disable MSI on RS400-200 and RS480, take #2

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Message-ID: <4641F100.70302@gmail.com>
Date:	Wed, 09 May 2007 18:04:16 +0200
From:	Tejun Heo <htejun@...il.com>
To:	Chuck Ebbert <cebbert@...hat.com>
CC:	Greg K-H <greg@...ah.com>, Jeff Garzik <jeff@...zik.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	IDE/ATA development list <linux-ide@...r.kernel.org>,
	Matías Alejandro Torres <torresmat@...il.com>
Subject: Re: [PATCH] pci-quirks: disable MSI on RS400-200 and RS480, take
 #2

Chuck Ebbert wrote:
> Tejun Heo wrote:
>>> FWIW several distros have turned off MSI by default and added
>>> a "pci=msi" option to enable it.
>> Yeah, it seem to cause a lot of problems on certain chips but I think
>> the correct path is to add PCI quirks for those.  Most MSI problems I've
>> seen are on these ATI chips.  Do you happen to know any other?
> 
> We had devices that didn't do MSI right, e.g. forcedeth and others I
> can't recall now.

Right, driver on such devices shouldn't enable MSI.  I think we have
several of those in ATA too.  Oh.. crap.  :-(

-- 
tejun
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