Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264193AbTEOTsi (ORCPT ); Thu, 15 May 2003 15:48:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264196AbTEOTsi (ORCPT ); Thu, 15 May 2003 15:48:38 -0400 Received: from h-68-165-86-241.DLLATX37.covad.net ([68.165.86.241]:24906 "EHLO sol.microgate.com") by vger.kernel.org with ESMTP id S264193AbTEOTsg (ORCPT ); Thu, 15 May 2003 15:48:36 -0400 Subject: Re: Test Patch: 2.5.69 Interrupt Latency From: Paul Fulghum To: Alan Stern Cc: "linux-kernel@vger.kernel.org" , johannes@erdfelt.com, USB development list In-Reply-To: <1053027740.2095.44.camel@diemos> References: <1053027740.2095.44.camel@diemos> Content-Type: text/plain Organization: Message-Id: <1053028778.2660.7.camel@diemos> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-4) Date: 15 May 2003 14:59:39 -0500 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1361 Lines: 40 On Thu, 2003-05-15 at 14:42, Paul Fulghum wrote: > On Thu, 2003-05-15 at 13:11, Alan Stern wrote: > > Maybe they are an Intel-specific addition? Or perhaps a more > > recent version of the spec has more information -- the one I've got is 1.1 > > (March 1996). > > I can't find any later documents. > > > Can you suggest a good way of detecting whether or not a controller is > > part of a PIIX4 chipset, to indicate whether or not the OC bits are valid? > > I don't see a generic way to determine the validity of these bits. > > I think the PCI ID is the only way: > Vendor ID 8086 > Device ID 7112 > > The erratum is only for the PIIX4, and it is > triggered only when the OC inputs are active, > so limiting the check to that device should > be OK. More clarification (at a suggestion from Charles Lepple): The errata covers all steppings of the 82371AB/EB/MB with a note that this bug will never be fixed in these devices. So checking for 8086:7112 should be sufficient without a need to check the version number. -- Paul Fulghum, paulkf@microgate.com Microgate Corporation, http://www.microgate.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/