From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754536Ab3AWJBO (ORCPT ); Wed, 23 Jan 2013 04:01:14 -0500 Received: from mga01.intel.com ([192.55.52.88]:25634 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753738Ab3AWJBM (ORCPT ); Wed, 23 Jan 2013 04:01:12 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,520,1355126400"; d="scan'208";a="277359116" From: shuox.liu@intel.com To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Cc: pavel@ucw.cz, rjw@sisk.pl, len.brown@intel.com, yanmin_zhang@linux.intel.com, ShuoX Liu , Yanmin Zhang Subject: [PATCH] PM / Runtime: Add new helper function: pm_runtime_active() Date: Wed, 23 Jan 2013 16:54:01 +0800 Message-Id: <1358931241-32375-1-git-send-email-shuox.liu@intel.com> X-Mailer: git-send-email 1.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: ShuoX Liu This boolean function simply returns whether or not the runtime status of the device is 'active'. The typical scenario is driver calls pm_runtime_get firstly, then check pm_runtime_active in atomic environment. Also add entry to Documentation/power/runtime.txt Signed-off-by: Yanmin Zhang Signed-off-by: ShuoX Liu --- Documentation/power/runtime_pm.txt | 4 ++++ include/linux/pm_runtime.h | 7 +++++++ 2 files changed, 11 insertions(+), 0 deletions(-) diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt index 03591a7..6c9f5d9 100644 --- a/Documentation/power/runtime_pm.txt +++ b/Documentation/power/runtime_pm.txt @@ -426,6 +426,10 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h: 'power.runtime_error' is set or 'power.disable_depth' is greater than zero) + bool pm_runtime_active(struct device *dev); + - return true if the device's runtime PM status is 'active' or its + 'power.disable_depth' field is not equal to zero, or false otherwise + bool pm_runtime_suspended(struct device *dev); - return true if the device's runtime PM status is 'suspended' and its 'power.disable_depth' field is equal to zero, or false otherwise diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h index f271860..c785c21 100644 --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -80,6 +80,12 @@ static inline bool pm_runtime_suspended(struct device *dev) && !dev->power.disable_depth; } +static inline bool pm_runtime_active(struct device *dev) +{ + return dev->power.runtime_status == RPM_ACTIVE + || dev->power.disable_depth; +} + static inline bool pm_runtime_status_suspended(struct device *dev) { return dev->power.runtime_status == RPM_SUSPENDED; @@ -132,6 +138,7 @@ static inline void pm_runtime_put_noidle(struct device *dev) {} static inline bool device_run_wake(struct device *dev) { return false; } static inline void device_set_run_wake(struct device *dev, bool enable) {} static inline bool pm_runtime_suspended(struct device *dev) { return false; } +static inline bool pm_runtime_active(struct device *dev) { return true; } static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } static inline bool pm_runtime_enabled(struct device *dev) { return false; } -- 1.7.1