Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933023AbWL1SdG (ORCPT ); Thu, 28 Dec 2006 13:33:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933021AbWL1SdG (ORCPT ); Thu, 28 Dec 2006 13:33:06 -0500 Received: from shawidc-mo1.cg.shawcable.net ([24.71.223.10]:62144 "EHLO pd2mo3so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933023AbWL1SdF (ORCPT ); Thu, 28 Dec 2006 13:33:05 -0500 Date: Thu, 28 Dec 2006 12:34:39 -0600 From: Robert Hancock Subject: Re: [PATCH] introduce config option to disable DMA zone on i386 In-reply-to: To: linux-kernel Cc: Arjan van de Ven , Marcelo Tosatti Message-id: <45940E3F.1050506@shaw.ca> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 944 Lines: 23 Arjan van de Ven wrote: > Hi, > > since one gets random corruption if a user gets this wrong, at least > make things like floppy and all CONFIG_ISA stuff conflict with this > option.... without that your patch feels like a walking time bomb... > (and please include all PCI drivers that only can do 24 bit or 28bit > or .. non-32bit dma as well) That sounds like a bug if this can happen. Drivers should be failing to initialize if they can't set the proper DMA mask, and the DMA API calls should be failing if the requested DMA mask can't be provided. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/ - 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/