Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760509Ab3DBFcH (ORCPT ); Tue, 2 Apr 2013 01:32:07 -0400 Received: from mail-bk0-f43.google.com ([209.85.214.43]:58874 "EHLO mail-bk0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760415Ab3DBFbs (ORCPT ); Tue, 2 Apr 2013 01:31:48 -0400 MIME-Version: 1.0 In-Reply-To: References: <2282655.IicBMMa6jN@vostro.rjw.lan> <1378320.ernsY1JWPv@vostro.rjw.lan> <3943547.m5K1tfygWn@vostro.rjw.lan> Date: Tue, 2 Apr 2013 13:31:47 +0800 Message-ID: Subject: Re: [Update][PATCH] PCI / PM: Disable runtime PM of PCIe ports From: huang ying To: "Rafael J. Wysocki" Cc: Bjorn Helgaas , Martin Mokrejs , ACPI Devel Maling List , Len Brown , Matthew Garrett , Sarah Sharp , LKML , "linux-pci@vger.kernel.org" , Zheng Yan , Huang Ying Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1742 Lines: 38 On Tue, Apr 2, 2013 at 1:28 PM, huang ying wrote: > On Tue, Apr 2, 2013 at 4:51 AM, Rafael J. Wysocki wrote: >> >> On Monday, April 01, 2013 11:34:46 AM Bjorn Helgaas wrote: >> > [+cc Zheng, who added this with 71a83bd727] >> > >> > On Sat, Mar 30, 2013 at 4:38 PM, Rafael J. Wysocki wrote: >> > > From: Rafael J. Wysocki >> > > >> > > The runtime PM of PCIe ports turns out to be quite fragile, as in >> > > some cases things work while in some other cases they don't and we >> > > don't seem to have a good way to determine whether or not they are >> > > going to work in advance. >> > >> > Do you have any references to problems encountered when enabling >> > runtime PM for PCIe ports? That information will be useful to anybody >> > who wants to take another crack at getting this working. >> >> Well, bug 53811 is one example and problems recently reported by >> Martin are another. Do you want me to dig deeper? > > For bug 53811, I have a debug patch posted in bugzilla to disable > runtime PM for PCIe port with hotplug capability. It appears that > patch resolved the issue for the reporter. Do think that patch can > solve the hotplug issue. For Martin's hotplug issue, it appears that a similar patch I sent to him resolve his hotplug issue too. For Martin's "XHCI dead port" issue, that is, PME issue. I just sent him another debug patch to try. Sorry for late! Best Regards, Huang Ying -- 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/