From patchwork Sun Sep 24 23:33:13 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 9968925 X-Patchwork-Delegate: rjw@sisk.pl Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2BEF2602D8 for ; Sun, 24 Sep 2017 23:42:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1BF9528B5E for ; Sun, 24 Sep 2017 23:42:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0DB0A28C00; Sun, 24 Sep 2017 23:42:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 762F328B5E for ; Sun, 24 Sep 2017 23:42:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932459AbdIXXmZ (ORCPT ); Sun, 24 Sep 2017 19:42:25 -0400 Received: from cloudserver094114.home.net.pl ([79.96.170.134]:59013 "EHLO cloudserver094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932444AbdIXXmY (ORCPT ); Sun, 24 Sep 2017 19:42:24 -0400 Received: from 79.184.252.54.ipv4.supernova.orange.pl (79.184.252.54) (HELO aspire.rjw.lan) by serwer1319399.home.pl (79.96.170.134) with SMTP (IdeaSmtpServer 0.82) id edf0b0209c7212c9; Mon, 25 Sep 2017 01:42:23 +0200 From: "Rafael J. Wysocki" To: Linux PCI , Bjorn Helgaas Cc: Alan Stern , Linux PM , Mika Westerberg , LKML Subject: [PATCH] PM / PCI: Do not resume any devices in pci_pm_prepare() Date: Mon, 25 Sep 2017 01:33:13 +0200 Message-ID: <1877076.QiUpNxchJO@aspire.rjw.lan> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Rafael J. Wysocki It should not be necessary to resume devices with ignore_children set in pci_pm_prepare(), because they should be resumed explcitly by their children drivers during suspend if need be and they will be resumed by pci_pm_suspend() after that anyway, so avoid doing that. Signed-off-by: Rafael J. Wysocki Acked-by: Bjorn Helgaas --- drivers/pci/pci-driver.c | 7 ------- 1 file changed, 7 deletions(-) Index: linux-pm/drivers/pci/pci-driver.c =================================================================== --- linux-pm.orig/drivers/pci/pci-driver.c +++ linux-pm/drivers/pci/pci-driver.c @@ -680,13 +680,6 @@ static int pci_pm_prepare(struct device { struct device_driver *drv = dev->driver; - /* - * Devices having power.ignore_children set may still be necessary for - * suspending their children in the next phase of device suspend. - */ - if (dev->power.ignore_children) - pm_runtime_resume(dev); - if (drv && drv->pm && drv->pm->prepare) { int error = drv->pm->prepare(dev); if (error)