Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760684AbYBEURU (ORCPT ); Tue, 5 Feb 2008 15:17:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754260AbYBEURK (ORCPT ); Tue, 5 Feb 2008 15:17:10 -0500 Received: from g1t0027.austin.hp.com ([15.216.28.34]:1540 "EHLO g1t0027.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756845AbYBEURI (ORCPT ); Tue, 5 Feb 2008 15:17:08 -0500 From: Bjorn Helgaas To: Linus Torvalds Subject: Re: a7839e96 (PNP: increase max resources) breaks my ALSA intel8x0 sound card Date: Tue, 5 Feb 2008 13:12:46 -0700 User-Agent: KMail/1.9.6 (enterprise 0.20070907.709405) Cc: Robert Hancock , Andrew Morton , avuton@gmail.com, yakui.zhao@intel.com, shaohua.li@intel.com, trenn@suse.de, Linux Kernel Mailing List , alsa-devel@alsa-project.org References: <200802050003.32591.bjorn.helgaas@hp.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200802051312.47074.bjorn.helgaas@hp.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1630 Lines: 41 On Tuesday 05 February 2008 11:15:12 am Linus Torvalds wrote: > > On Tue, 5 Feb 2008, Bjorn Helgaas wrote: > > > > > > - PnP/ACPI resource allocation *after* it, but before driver loading > > > (which wll cause new resources to be allocated). This could be > > > fs_initcall, or whatever (that's what things like "acpi_event_init" > > > already do). > > > > If we put the PNP system driver here, we can easily do a quirk that > > ignores PNP resources that overlap PCI resources. > > No, you don't need any quirks: you just do an "insert_resource()" and > ignore the error return. If the (bogus) PnP resource clashes with the > (correct) hardware PCI resource, the insert will simply fail. No quirks > needed. > > > But it's kind of > > ugly to have the ACPI PCI root driver early and other PNP drivers > > later because they're basically similar animals. > > No they are not. > > If one does just device enumeration, and the other does resource > registrations, then they ARE NOT similar animals at all. Don't claim that > they are. Whoa, easy :-) I just meant they're similar in that we discover PCI root bridges and other PNP devices by traversing the ACPI namespace, so unless we make special arrangements, we bind drivers to them at roughly the same time. I'll play with your insert_resource() idea and see if I can figure something out. Bjorn -- 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/