Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761387AbYAKVM7 (ORCPT ); Fri, 11 Jan 2008 16:12:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754758AbYAKVMv (ORCPT ); Fri, 11 Jan 2008 16:12:51 -0500 Received: from smtp2.linux-foundation.org ([207.189.120.14]:53055 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750761AbYAKVMu (ORCPT ); Fri, 11 Jan 2008 16:12:50 -0500 Date: Fri, 11 Jan 2008 13:12:12 -0800 (PST) From: Linus Torvalds To: Matthew Wilcox cc: Greg KH , Arjan van de Ven , Greg KH , linux-kernel@vger.kernel.org, Jeff Garzik , linux-pci@atrey.karlin.mff.cuni.cz, Benjamin Herrenschmidt , Martin Mares Subject: Re: [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in In-Reply-To: <20080111204228.GP18741@parisc-linux.org> Message-ID: References: <20071225032605.29147200@laptopd505.fenrus.org> <20080111190229.GB10112@kroah.com> <20080111192820.GM18741@parisc-linux.org> <20080111114002.3e59d1ad@laptopd505.fenrus.org> <20080111194524.GA17170@suse.de> <20080111194931.GN18741@parisc-linux.org> <20080111201716.GO18741@parisc-linux.org> <20080111204228.GP18741@parisc-linux.org> User-Agent: Alpine 1.00 (LFD 882 2007-12-20) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 603 Lines: 19 On Fri, 11 Jan 2008, Matthew Wilcox wrote: > > But they can't. We limit the size they can access to 256 bytes, unless > the kernel probed address 256 and it worked. Umm. Probing address 256 (or *any* address) using MMCONFIG will simply lock up the machine. HARD. What's so hard to understand about MMCONFIG being broken on certain hardware? Linus -- 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/