netdev - Re: [PATCH] skge: add quirk to limit DMA

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Date:	Tue, 05 Oct 2010 15:09:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...tta.com
Cc:	sgruszka@...hat.com, netdev@...r.kernel.org, luya@...oraproject.org
Subject: Re: [PATCH] skge: add quirk to limit DMA

From: Stephen Hemminger <shemminger@...tta.com>
Date: Wed, 6 Oct 2010 06:58:45 +0900

> On Tue, 05 Oct 2010 00:18:00 -0700 (PDT)
> David Miller <davem@...emloft.net> wrote:
> 
>> From: Stanislaw Gruszka <sgruszka@...hat.com>
>> Date: Wed, 29 Sep 2010 11:33:23 +0200
>> 
>> > Skge devices installed on some Gigabyte motherboards are not able to
>> > perform 64 dma correctly due to board PCI implementation, so limit
>> > DMA to 32bit if such boards are detected.
>> > 
>> > Bug was reported here:
>> > https://bugzilla.redhat.com/show_bug.cgi?id=447489
>> > 
>> > Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com>
>> > Tested-by: Luya Tshimbalanga <luya@...oraproject.org>
>> 
>> Stephen?  Can I get an ACK or some kind of other status on this?
> 
> I was hoping to find the hardware somewhere to dig deeper into
> this. But until I know more please apply the patch. There are
> two possibilities that still exist, 1) it is true for all devices
> on this motherboard (in which cases it should be a PCI quirk),
> 2) it is a driver bug. The test was going to be putting a skge
> pci card in a slot on the MB.

Ok, thanks Stephen, I'll apply his patch for now.
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