From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: [PATCH] skge: add quirk to limit DMA Date: Wed, 6 Oct 2010 06:58:45 +0900 Message-ID: <20101006065845.5759dbeb@s6510> References: <20100929092515.GA6804@redhat.com> <20101005.001800.13732127.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: sgruszka@redhat.com, netdev@vger.kernel.org, luya@fedoraproject.org To: David Miller Return-path: Received: from mail.vyatta.com ([76.74.103.46]:59821 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753529Ab0JEV6u (ORCPT ); Tue, 5 Oct 2010 17:58:50 -0400 In-Reply-To: <20101005.001800.13732127.davem@davemloft.net> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, 05 Oct 2010 00:18:00 -0700 (PDT) David Miller wrote: > From: Stanislaw Gruszka > 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 > > Tested-by: Luya Tshimbalanga > > 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.