From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754387Ab2GPVbk (ORCPT ); Mon, 16 Jul 2012 17:31:40 -0400 Received: from ogre.sisk.pl ([193.178.161.156]:43068 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751721Ab2GPV2k (ORCPT ); Mon, 16 Jul 2012 17:28:40 -0400 From: "Rafael J. Wysocki" To: Linux PM list Subject: [RFC][PATCH 13/14] PM / Domains: Introduce pm_genpd_present() Date: Mon, 16 Jul 2012 23:30:59 +0200 User-Agent: KMail/1.13.6 (Linux/3.5.0-rc5+; KDE/4.6.0; x86_64; ; ) Cc: Mark Brown , LKML , Matthew Garrett , Magnus Damm , Arnd Bergmann , Grant Likely , "Linux-sh list" References: <201207032302.17805.rjw@sisk.pl> <201207052217.48086.rjw@sisk.pl> <201207162315.49073.rjw@sisk.pl> In-Reply-To: <201207162315.49073.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit Message-Id: <201207162331.00295.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rafael J. Wysocki Introduce function pm_genpd_present() allowing the caller to check if the given generic PM domain has been initialized. Signed-off-by: Rafael J. Wysocki --- drivers/base/power/domain.c | 22 ++++++++++++++++++++++ include/linux/pm_domain.h | 5 +++++ 2 files changed, 27 insertions(+) Index: linux/drivers/base/power/domain.c =================================================================== --- linux.orig/drivers/base/power/domain.c +++ linux/drivers/base/power/domain.c @@ -2089,3 +2089,25 @@ void pm_genpd_init(struct generic_pm_dom list_add(&genpd->gpd_list_node, &gpd_list); mutex_unlock(&gpd_list_lock); } + +/** + * pm_genpd_present - Check if the given PM domain has been initialized + * @genpd: PM domain to check. + */ +bool pm_genpd_present(struct generic_pm_domain *genpd) +{ + struct generic_pm_domain *gpd = NULL; + + if (IS_ERR_OR_NULL(genpd)) + return false; + + mutex_lock(&gpd_list_lock); + + list_for_each_entry(gpd, &gpd_list, gpd_list_node) + if (gpd == genpd) + break; + + mutex_unlock(&gpd_list_lock); + + return gpd == genpd; +} Index: linux/include/linux/pm_domain.h =================================================================== --- linux.orig/include/linux/pm_domain.h +++ linux/include/linux/pm_domain.h @@ -161,6 +161,7 @@ extern int genpd_attach_cpuidle(struct g extern int genpd_detach_cpuidle(struct generic_pm_domain *genpd); extern void pm_genpd_init(struct generic_pm_domain *genpd, struct dev_power_governor *gov, bool is_off); +extern bool pm_genpd_present(struct generic_pm_domain *genpd); extern int pm_genpd_poweron(struct generic_pm_domain *genpd); extern int pm_genpd_name_poweron(const char *domain_name); @@ -239,6 +240,10 @@ static inline void pm_genpd_init(struct struct dev_power_governor *gov, bool is_off) { } +static inline bool pm_genpd_present(struct generic_pm_domain *genpd) +{ + return false; +} static inline int pm_genpd_poweron(struct generic_pm_domain *genpd) { return -ENOSYS;