From patchwork Sun Jan 8 08:41:45 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukas Wunner X-Patchwork-Id: 9503355 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 47E7A60757 for ; Sun, 8 Jan 2017 08:43:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 401EB282ED for ; Sun, 8 Jan 2017 08:43:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 346B12832B; Sun, 8 Jan 2017 08:43:28 +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 B7930282ED for ; Sun, 8 Jan 2017 08:43:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031673AbdAHInW (ORCPT ); Sun, 8 Jan 2017 03:43:22 -0500 Received: from mailout2.hostsharing.net ([83.223.90.233]:39181 "EHLO mailout2.hostsharing.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1032022AbdAHInV (ORCPT ); Sun, 8 Jan 2017 03:43:21 -0500 Received: from h08.hostsharing.net (h08.hostsharing.net [83.223.95.28]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mailout2.hostsharing.net (Postfix) with ESMTPS id 4809210189B52; Sun, 8 Jan 2017 09:43:18 +0100 (CET) Received: from localhost (3-38-90-81.adsl.cmo.de [81.90.38.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by h08.hostsharing.net (Postfix) with ESMTPSA id EF3DF6042B9F; Sun, 8 Jan 2017 09:43:16 +0100 (CET) X-Mailbox-Line: From 1882c100ba59a7e7034c63a422f5f553377e6c70 Mon Sep 17 00:00:00 2001 Message-Id: <1882c100ba59a7e7034c63a422f5f553377e6c70.1483806825.git.lukas@wunner.de> In-Reply-To: References: From: Lukas Wunner Date: Sun, 8 Jan 2017 09:41:45 +0100 Subject: [PATCH v4 4/8] Revert "PM / Runtime: Remove the exported function pm_children_suspended()" To: Greg Kroah-Hartman , linux-kernel@vger.kernel.org Cc: Andreas Noever , linux-pci@vger.kernel.org, linux-pm@vger.kernel.org, Chen Yu , "Rafael J. Wysocki" , Ulf Hansson 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 This reverts commit 62006c1702b3b1be0c0726949e0ee0ea2326be9c which removed pm_children_suspended() because it had only a single caller. We're about to add a second caller, so establish the status quo ante. Cc: Ulf Hansson Cc: Rafael J. Wysocki Signed-off-by: Lukas Wunner --- drivers/base/power/runtime.c | 3 +-- include/linux/pm_runtime.h | 7 +++++++ 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 872eac4..03293c3 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -243,8 +243,7 @@ static int rpm_check_suspend_allowed(struct device *dev) retval = -EACCES; else if (atomic_read(&dev->power.usage_count) > 0) retval = -EAGAIN; - else if (!dev->power.ignore_children && - atomic_read(&dev->power.child_count)) + else if (!pm_children_suspended(dev)) retval = -EBUSY; /* Pending resume requests take precedence over suspends. */ diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h index ca4823e..7de2aa5c 100644 --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -66,6 +66,12 @@ static inline void pm_suspend_ignore_children(struct device *dev, bool enable) dev->power.ignore_children = enable; } +static inline bool pm_children_suspended(struct device *dev) +{ + return dev->power.ignore_children + || !atomic_read(&dev->power.child_count); +} + static inline void pm_runtime_get_noresume(struct device *dev) { atomic_inc(&dev->power.usage_count); @@ -161,6 +167,7 @@ static inline void pm_runtime_allow(struct device *dev) {} static inline void pm_runtime_forbid(struct device *dev) {} static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {} +static inline bool pm_children_suspended(struct device *dev) { return false; } static inline void pm_runtime_get_noresume(struct device *dev) {} static inline void pm_runtime_put_noidle(struct device *dev) {} static inline bool device_run_wake(struct device *dev) { return false; }