From patchwork Wed Feb 12 10:43:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Brauner X-Patchwork-Id: 212891 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24C8AC2BA83 for ; Wed, 12 Feb 2020 10:44:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EDD6021D7D for ; Wed, 12 Feb 2020 10:44:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728003AbgBLKno (ORCPT ); Wed, 12 Feb 2020 05:43:44 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:52552 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727973AbgBLKnn (ORCPT ); Wed, 12 Feb 2020 05:43:43 -0500 Received: from ip5f5bf7ec.dynamic.kabel-deutschland.de ([95.91.247.236] helo=wittgenstein.fritz.box) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1j1pUa-0005aC-T4; Wed, 12 Feb 2020 10:43:40 +0000 From: Christian Brauner To: "David S. Miller" , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Cc: "Rafael J. Wysocki" , Pavel Machek , Jakub Kicinski , Eric Dumazet , Stephen Hemminger , linux-pm@vger.kernel.org, Christian Brauner Subject: [PATCH net-next 07/10] drivers/base/power: add dpm_sysfs_change_owner() Date: Wed, 12 Feb 2020 11:43:18 +0100 Message-Id: <20200212104321.43570-8-christian.brauner@ubuntu.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200212104321.43570-1-christian.brauner@ubuntu.com> References: <20200212104321.43570-1-christian.brauner@ubuntu.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add a helper to change the owner of a device's power entries. This needs to happen when the ownership of a device is changed, e.g. when moving network devices between network namespaces. The ownership of a device's power entries is determined based on the ownership of the corresponding kobject, i.e. only if the ownership of a kobject is changed will this function change the ownership of the corresponding sysfs entries. This function will be used to correctly account for ownership changes, e.g. when moving network devices between network namespaces. Signed-off-by: Christian Brauner --- drivers/base/core.c | 4 ++++ drivers/base/power/power.h | 2 ++ drivers/base/power/sysfs.c | 37 +++++++++++++++++++++++++++++++++++++ 3 files changed, 43 insertions(+) diff --git a/drivers/base/core.c b/drivers/base/core.c index 262217287a09..dfaf6d3614fa 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -3515,6 +3515,10 @@ int device_change_owner(struct device *dev) if (error) goto out; + error = dpm_sysfs_change_owner(dev); + if (error) + goto out; + #ifdef CONFIG_BLOCK if (sysfs_deprecated && dev->class == &block_class) goto out; diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h index 444f5c169a0b..f68490d0811b 100644 --- a/drivers/base/power/power.h +++ b/drivers/base/power/power.h @@ -74,6 +74,7 @@ extern int pm_qos_sysfs_add_flags(struct device *dev); extern void pm_qos_sysfs_remove_flags(struct device *dev); extern int pm_qos_sysfs_add_latency_tolerance(struct device *dev); extern void pm_qos_sysfs_remove_latency_tolerance(struct device *dev); +extern int dpm_sysfs_change_owner(struct device *dev); #else /* CONFIG_PM */ @@ -88,6 +89,7 @@ static inline void pm_runtime_remove(struct device *dev) {} static inline int dpm_sysfs_add(struct device *dev) { return 0; } static inline void dpm_sysfs_remove(struct device *dev) {} +static inline int dpm_sysfs_change_owner(struct device *dev) { return 0; } #endif diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index d7d82db2e4bc..ce1fd346e854 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -684,6 +684,43 @@ int dpm_sysfs_add(struct device *dev) return rc; } +int dpm_sysfs_change_owner(struct device *dev) +{ + int rc; + + if (device_pm_not_required(dev)) + return 0; + + rc = sysfs_group_change_owner(&dev->kobj, &pm_attr_group); + if (rc) + return rc; + + if (pm_runtime_callbacks_present(dev)) { + rc = sysfs_group_change_owner(&dev->kobj, + &pm_runtime_attr_group); + if (rc) + return rc; + } + if (device_can_wakeup(dev)) { + rc = sysfs_group_change_owner(&dev->kobj, + &pm_wakeup_attr_group); + if (rc) + return rc; + } + if (dev->power.set_latency_tolerance) { + rc = sysfs_group_change_owner(&dev->kobj, + &pm_qos_latency_tolerance_attr_group); + if (rc) + return rc; + } + if (dev->power.wakeup && dev->power.wakeup->dev) { + rc = device_change_owner(dev->power.wakeup->dev); + if (rc) + return rc; + } + return 0; +} + int wakeup_sysfs_add(struct device *dev) { return sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group);