From patchwork Sat Mar 30 22:38:02 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 232580 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id BD9DB2C0098 for ; Sun, 31 Mar 2013 09:30:34 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754335Ab3C3Wad (ORCPT ); Sat, 30 Mar 2013 18:30:33 -0400 Received: from hydra.sisk.pl ([212.160.235.94]:48096 "EHLO hydra.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753951Ab3C3Wab (ORCPT ); Sat, 30 Mar 2013 18:30:31 -0400 Received: from vostro.rjw.lan (afjs100.neoplus.adsl.tpnet.pl [95.49.252.100]) by hydra.sisk.pl (Postfix) with ESMTPSA id 6E3FDE3EE9; Sat, 30 Mar 2013 23:29:09 +0100 (CET) From: "Rafael J. Wysocki" To: Bjorn Helgaas Cc: Martin Mokrejs , ACPI Devel Maling List , Len Brown , Matthew Garrett , Sarah Sharp , LKML , linux-pci@vger.kernel.org Subject: [Update][PATCH] PCI / PM: Disable runtime PM of PCIe ports Date: Sat, 30 Mar 2013 23:38:02 +0100 Message-ID: <1378320.ernsY1JWPv@vostro.rjw.lan> User-Agent: KMail/4.9.5 (Linux/3.9.0-rc4+; KDE/4.9.5; x86_64; ; ) In-Reply-To: <2990024.LMTIBUbM3d@vostro.rjw.lan> References: <2282655.IicBMMa6jN@vostro.rjw.lan> <51548C9E.9090703@fold.natur.cuni.cz> <2990024.LMTIBUbM3d@vostro.rjw.lan> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org 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. For this reason, avoid enabling runtime PM for PCIe ports by keeping their runtime PM reference counters always above 0 for the time being. Signed-off-by: Rafael J. Wysocki --- This version also removes the no longer necessary (and empty anyway) port_runtime_pm_black_list[] table. Thanks, Rafael --- drivers/pci/pcie/portdrv_pci.c | 13 ------------- 1 file changed, 13 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux-pm/drivers/pci/pcie/portdrv_pci.c =================================================================== --- linux-pm.orig/drivers/pci/pcie/portdrv_pci.c +++ linux-pm/drivers/pci/pcie/portdrv_pci.c @@ -185,14 +185,6 @@ static const struct dev_pm_ops pcie_port #endif /* !PM */ /* - * PCIe port runtime suspend is broken for some chipsets, so use a - * black list to disable runtime PM for these chipsets. - */ -static const struct pci_device_id port_runtime_pm_black_list[] = { - { /* end: all zeroes */ } -}; - -/* * pcie_portdrv_probe - Probe PCI-Express port devices * @dev: PCI-Express port device being probed * @@ -225,16 +217,11 @@ static int pcie_portdrv_probe(struct pci * it by default. */ dev->d3cold_allowed = false; - if (!pci_match_id(port_runtime_pm_black_list, dev)) - pm_runtime_put_noidle(&dev->dev); - return 0; } static void pcie_portdrv_remove(struct pci_dev *dev) { - if (!pci_match_id(port_runtime_pm_black_list, dev)) - pm_runtime_get_noresume(&dev->dev); pcie_port_device_remove(dev); pci_disable_device(dev); }