Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760587Ab3DBFek (ORCPT ); Tue, 2 Apr 2013 01:34:40 -0400 Received: from mail-bk0-f44.google.com ([209.85.214.44]:59843 "EHLO mail-bk0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760297Ab3DBFeh (ORCPT ); Tue, 2 Apr 2013 01:34:37 -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 13:34:35 +0800 Message-ID: Subject: Re: [Update][PATCH] PCI / PM: Disable runtime PM of PCIe ports From: huang ying To: Bjorn Helgaas Cc: "Rafael J. Wysocki" , 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: 1948 Lines: 45 Hi, Bjorn, On Tue, Apr 2, 2013 at 4:53 AM, Bjorn Helgaas wrote: > On Mon, Apr 1, 2013 at 2:51 PM, 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? > > OK, I got this one: > > https://bugzilla.kernel.org/show_bug.cgi?id=53811 > > Martin has reported a lot of problems lately, and I don't know which > are related to runtime PM for PCIe ports. I was hoping for a couple > URLs to put in the changelog so that when somebody gets the itch to > make this work, they have some useful info to start from. If you > point me at a specific message, I'll dig up an archive URL for it. > > Otherwise, I'm afraid we'll just oscillate between "enable PM, find > bug, disable PM, enable PM, find same bug, disable PM, etc..." Sorry for late! I am trying to fix a way to fix 53811 and Martin's bug without disable PM for port totally. 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/