Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760297Ab3DBF2v (ORCPT ); Tue, 2 Apr 2013 01:28:51 -0400 Received: from mail-bk0-f54.google.com ([209.85.214.54]:48914 "EHLO mail-bk0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753235Ab3DBF2s (ORCPT ); Tue, 2 Apr 2013 01:28:48 -0400 MIME-Version: 1.0 In-Reply-To: <3943547.m5K1tfygWn@vostro.rjw.lan> References: <2282655.IicBMMa6jN@vostro.rjw.lan> <1378320.ernsY1JWPv@vostro.rjw.lan> <3943547.m5K1tfygWn@vostro.rjw.lan> Date: Tue, 2 Apr 2013 13:28:46 +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 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: 1406 Lines: 32 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. 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/