linux-kernel - Re: [PATCH] pci: enable MSI on 8132

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Date:	Wed, 18 Feb 2009 10:18:20 -0800 (PST)
From:	david@...g.hm
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Matthew Wilcox <matthew@....cx>, Yinghai Lu <yinghai@...nel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-scsi@...r.kernel.org, DL-MPTFusionLinux@....com,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH] pci: enable MSI on 8132

On Wed, 18 Feb 2009, Andrew Morton wrote:

> Subject: Re: [PATCH] pci: enable MSI on 8132
> 
> On Wed, 18 Feb 2009 04:27:28 -0800 (PST) david@...g.hm wrote:
>
>> On Wed, 18 Feb 2009, Matthew Wilcox wrote:
>>
>>> On Tue, Feb 17, 2009 at 08:40:09PM -0800, Yinghai Lu wrote:
>>>>
>>>> Impact: workaround BIOS that doesn't enable that bit
>>>>
>>>> David reported that LSI sas doesn't work with MSI.
>>>> it turns out that BIOS doesn't enable HT MSI
>>>> 8132 does support HT MSI.
>>>> add quirk to enable it
>>>>
>>>> Reported-by: David Lang <david@...g.hm>
>>>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>>>
>>> Reviewed-by: Matthew Wilcox <willy@...ux.intel.com>
>>>
>>> Jesse, I think this should go into Linus' tree sooner rather than later.
>>
>> please forward to -stable as well. this is a regression since the card
>> works with older kernels.
>>
>
> Which kernel version introduced the regression?

I'm not sure. I know that 2.6.24 Debian EThch-and-a-half worked, 2.6.27+ 
failed. how critical is it to narrow down exactly where the problem crept 
in?

Yinghai Lu, Matthew Wilcox,
   can either of you identify where the problem would have appeared?

> Do we not need mpt-fix-enable-lsi-sas-to-use-msi-as-default.patch as
> well, to fix this regression?

I don't know. the current -git kernel fails, but with these two patches 
works. I haven't tried backporting these patches (if there are any changes 
at all needed I probably won't be able to do it)

David Lang

> I sent mpt-fix-enable-lsi-sas-to-use-msi-as-default.patch to the
> maintainers a week ago and it was ignored, along with everything else.
> If this happens again I shall merge it under my own cognisance, along
> with everything else.
>
>
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