Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754848AbXFKPUJ (ORCPT ); Mon, 11 Jun 2007 11:20:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753028AbXFKPT6 (ORCPT ); Mon, 11 Jun 2007 11:19:58 -0400 Received: from mx1.redhat.com ([66.187.233.31]:36268 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752955AbXFKPT5 (ORCPT ); Mon, 11 Jun 2007 11:19:57 -0400 Date: Mon, 11 Jun 2007 11:19:44 -0400 From: Dave Jones To: Auke Kok Cc: linux-kernel@vger.kernel.org, linux-pci@atrey.karlin.mff.cuni.cz, gregkh@suse.de Subject: Re: [PATCH 2/2] [RFC] PCI: Change all drivers to use pci_device->revision Message-ID: <20070611151944.GH9174@redhat.com> Mail-Followup-To: Dave Jones , Auke Kok , linux-kernel@vger.kernel.org, linux-pci@atrey.karlin.mff.cuni.cz, gregkh@suse.de References: <20070608224630.31777.17807.stgit@localhost.localdomain> <20070608224636.31777.17302.stgit@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070608224636.31777.17302.stgit@localhost.localdomain> User-Agent: Mutt/1.5.14 (2007-02-12) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1094 Lines: 28 On Fri, Jun 08, 2007 at 03:46:36PM -0700, Auke Kok wrote: > Instead of all drivers reading pci config space to get the revision > ID, they can now use the pci_device->revision member. > > This exposes some issues where drivers where reading a word or a dword > for the revision number, and adding useless error-handling around the > read. Some drivers even just read it for no purpose of all. > > In devices where the revision ID is being copied over and used in what > appears to be the equivalent of hotpath, I have left the copy code > and the cached copy as not to influence the driver's performance. > > Compile tested with make all{yes,mod}config on x86_64 and i386. > > Signed-off-by: Auke Kok ACKed-by: Dave Jones for the cpufreq bits. Dave -- http://www.codemonkey.org.uk - 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/