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

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Date:	Wed, 09 May 2007 17:50:52 +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:
>> MSI doesn't work on RS400-200 and RS480 requiring pci=nomsi kernel
>> boot parameter for ahci to work.  This patch renames quirk_svw_msi()
>> to quirk_disable_all_msi() and use it to disable MSI on those chips.
>>
>>   http://thread.gmane.org/gmane.linux.ide/17820
>>   http://thread.gmane.org/gmane.linux.ide/17516
>>   https://bugzilla.novell.com/show_bug.cgi?id=263893
>>
> 
> 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?

Thanks.

-- 
tejun
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