Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935898AbXJPUOF (ORCPT ); Tue, 16 Oct 2007 16:14:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934944AbXJPUNv (ORCPT ); Tue, 16 Oct 2007 16:13:51 -0400 Received: from mga11.intel.com ([192.55.52.93]:5337 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934624AbXJPUNu (ORCPT ); Tue, 16 Oct 2007 16:13:50 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.21,284,1188802800"; d="scan'208";a="347918213" Date: Tue, 16 Oct 2007 13:07:57 -0700 From: Kristen Carlson Accardi To: Mark Lord Cc: pcihpd-discuss@lists.sourceforge.net, Linux Kernel Subject: Re: PCIe Hotplug: NFG unless I boot with card already inserted. Message-Id: <20071016130757.ed2f2ce4.kristen.c.accardi@intel.com> In-Reply-To: <47151191.40406@rtr.ca> References: <4714C0A6.1030204@rtr.ca> <4714D700.7060008@rtr.ca> <20071016084634.8a0d695a.kristen.c.accardi@intel.com> <47150565.5090102@rtr.ca> <20071016114328.a96e8bcb.kristen.c.accardi@intel.com> <47150982.6050102@rtr.ca> <471509FE.7080505@rtr.ca> <47151191.40406@rtr.ca> X-Mailer: Sylpheed 2.3.1 (GTK+ 2.10.13; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1874 Lines: 44 On Tue, 16 Oct 2007 15:31:29 -0400 Mark Lord wrote: > Mark Lord wrote: > > Mark Lord wrote: > >> Kristen Carlson Accardi wrote: > >>> On Tue, 16 Oct 2007 14:39:33 -0400 > >>> Mark Lord wrote: > >>> > >>>> I also checked my modprobe.d/ options, and I am using pciehp_force=1. > >>>> Without that flag, none of this ever works. > >>> > >>> OK - I suspected something like this. Most Dell computers don't support > >>> ExpressCard hotplug using Native PCIe -- in fact, I've not seen a single > >>> one, they explicitly disable it because they have not validated it or > >>> they have and something didn't work right. I'll take a look at what > >>> you've > >>> got, but be aware that you are forcing pciehp to load and operate on > >>> a system > >>> where they've certainly either not tested it, or tested it and something > >>> bad happened. > >> > >> Perhaps. But this one works perfectly, except for two driver bugs: > >> > >> 1. Driver does not notice already-inserted cards after modprobe. > >> 2. Driver fails to function after suspend/resume until reloaded. > >> > >> Both of those are fixable in the kernel. > > > > Ahh.. point 2 in particular suffers from "suspend/resume" not implemented. > > Or rather, implemented as a pair of "do nothing" functions. > I tried to reproduce this on a Lenovo T61, which does have proper firmware support for _OSC, and also has been validated, and the driver which is in 2.6.23-git8 seems to work fine, even across suspend resume. I suspect that your system just doesn't support pcie hotplug properly. You might try getting a BIOS update from Dell. - 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/