Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932789AbXHEAP5 (ORCPT ); Sat, 4 Aug 2007 20:15:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1765229AbXHEAPs (ORCPT ); Sat, 4 Aug 2007 20:15:48 -0400 Received: from gate.crashing.org ([63.228.1.57]:59502 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1765231AbXHEAPs (ORCPT ); Sat, 4 Aug 2007 20:15:48 -0400 Subject: Re: [PATCH 2.6.22.y] ieee1394: revert "sbp2: enforce 32bit DMA mapping" From: Benjamin Herrenschmidt To: Stefan Richter Cc: Robert Hancock , linuxppc-dev@ozlabs.org, Olaf Hering , stable@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <46B4B7C6.1040107@s5r6.in-berlin.de> References: <46B4B3DC.7020609@shaw.ca> <46B4B7C6.1040107@s5r6.in-berlin.de> Content-Type: text/plain Date: Sun, 05 Aug 2007 10:15:26 +1000 Message-Id: <1186272926.938.8.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 780 Lines: 21 > > If setting 32-bit DMA mask fails on ppc64, that sounds like a problem > > with the DMA implementation on that architecture. There are enough cards > > out there that only support 32-bit DMA that this really needs to work.. > > Yes, could the PPC folks please have a look at it? Thanks. Smells like we may have a bug there. No worries though, all current PPC machines have an iommu that will not give out addresses above 32 bits anyway, but I'll double check what's up. Do you see something in dmesg when that happens ? Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/