From patchwork Mon Oct 16 01:30:06 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: 10007429 X-Patchwork-Delegate: bhelgaas@google.com 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 632D9601E9 for ; Mon, 16 Oct 2017 01:46:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5543B2623C for ; Mon, 16 Oct 2017 01:46:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4A15D2654B; Mon, 16 Oct 2017 01:46:36 +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, TVD_PH_BODY_ACCOUNTS_PRE autolearn=unavailable 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 D6F702623C for ; Mon, 16 Oct 2017 01:46:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752007AbdJPBqT (ORCPT ); Sun, 15 Oct 2017 21:46:19 -0400 Received: from cloudserver094114.home.net.pl ([79.96.170.134]:60873 "EHLO cloudserver094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751734AbdJPBnE (ORCPT ); Sun, 15 Oct 2017 21:43:04 -0400 Received: from 79.184.255.244.ipv4.supernova.orange.pl (79.184.255.244) (HELO aspire.rjw.lan) by serwer1319399.home.pl (79.96.170.134) with SMTP (IdeaSmtpServer 0.82) id a404215512867508; Mon, 16 Oct 2017 03:43:01 +0200 From: "Rafael J. Wysocki" To: Linux PM Cc: Bjorn Helgaas , Alan Stern , Greg Kroah-Hartman , LKML , Linux ACPI , Linux PCI , Linux Documentation , Mika Westerberg , Ulf Hansson , Andy Shevchenko , Kevin Hilman , Wolfram Sang , linux-i2c@vger.kernel.org, Lee Jones Subject: [PATCH 08/12] ACPI / PM: Take SMART_SUSPEND driver flag into account Date: Mon, 16 Oct 2017 03:30:06 +0200 Message-ID: <27437209.Q3JHjOQKcL@aspire.rjw.lan> In-Reply-To: <3806130.B2KCK0tvef@aspire.rjw.lan> References: <3806130.B2KCK0tvef@aspire.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 X-Virus-Scanned: ClamAV using ClamSMTP From: Rafael J. Wysocki Make the ACPI PM domain take DPM_FLAG_SMART_SUSPEND into account in its system suspend callbacks. [Note that the pm_runtime_suspended() check in acpi_dev_needs_resume() is an optimization, because if is not passed, all of the subsequent checks may be skipped and some of them are much more overhead in general.] Signed-off-by: Rafael J. Wysocki --- drivers/acpi/device_pm.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) Index: linux-pm/drivers/acpi/device_pm.c =================================================================== --- linux-pm.orig/drivers/acpi/device_pm.c +++ linux-pm/drivers/acpi/device_pm.c @@ -936,7 +936,8 @@ static bool acpi_dev_needs_resume(struct u32 sys_target = acpi_target_system_state(); int ret, state; - if (device_may_wakeup(dev) != !!adev->wakeup.prepare_count) + if (!pm_runtime_suspended(dev) || !adev || + device_may_wakeup(dev) != !!adev->wakeup.prepare_count) return true; if (sys_target == ACPI_STATE_S0) @@ -968,9 +969,6 @@ int acpi_subsys_prepare(struct device *d if (!ret && dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_PREPARE)) return 0; - if (!adev || !pm_runtime_suspended(dev)) - return 0; - return !acpi_dev_needs_resume(dev, adev); } EXPORT_SYMBOL_GPL(acpi_subsys_prepare); @@ -996,12 +994,17 @@ EXPORT_SYMBOL_GPL(acpi_subsys_complete); * acpi_subsys_suspend - Run the device driver's suspend callback. * @dev: Device to handle. * - * Follow PCI and resume devices suspended at run time before running their - * system suspend callbacks. + * Follow PCI and resume devices from runtime suspend before running their + * system suspend callbacks, unless the driver can cope with runtime-suspended + * devices during system suspend and there are no ACPI-specific reasons for + * resuming them. */ int acpi_subsys_suspend(struct device *dev) { - pm_runtime_resume(dev); + if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) || + acpi_dev_needs_resume(dev, ACPI_COMPANION(dev))) + pm_runtime_resume(dev); + return pm_generic_suspend(dev); } EXPORT_SYMBOL_GPL(acpi_subsys_suspend); @@ -1047,7 +1050,9 @@ int acpi_subsys_freeze(struct device *de * runtime-suspended devices should not be touched during freeze/thaw * transitions. */ - pm_runtime_resume(dev); + if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND)) + pm_runtime_resume(dev); + return pm_generic_freeze(dev); } EXPORT_SYMBOL_GPL(acpi_subsys_freeze);