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

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Message-ID: <20101006065845.5759dbeb@s6510>
Date:	Wed, 6 Oct 2010 06:58:45 +0900
From:	Stephen Hemminger <shemminger@...tta.com>
To:	David Miller <davem@...emloft.net>
Cc:	sgruszka@...hat.com, netdev@...r.kernel.org, luya@...oraproject.org
Subject: Re: [PATCH] skge: add quirk to limit DMA

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.

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