From patchwork Thu Aug 28 08:38:54 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulf Hansson X-Patchwork-Id: 4799751 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8F848C0338 for ; Thu, 28 Aug 2014 08:39:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9C219201F7 for ; Thu, 28 Aug 2014 08:39:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B938620145 for ; Thu, 28 Aug 2014 08:39:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935780AbaH1IjW (ORCPT ); Thu, 28 Aug 2014 04:39:22 -0400 Received: from mail-lb0-f171.google.com ([209.85.217.171]:50214 "EHLO mail-lb0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936365AbaH1IjP (ORCPT ); Thu, 28 Aug 2014 04:39:15 -0400 Received: by mail-lb0-f171.google.com with SMTP id n15so498143lbi.30 for ; Thu, 28 Aug 2014 01:39:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Ou0RlgsXVfIDS2ESgOcueAoPt9PqQED91dHPmGSxDMU=; b=A/A7dU/BB1NLS9bDv76omn7ZFEgbU/uDKj2BxaOESk8tkVrVL1yFB1WJ8mMC+abCTl C9fnOQAoqHOF5d/b6MFN0ZU4pXiIO8u52+OT+uCDI59X3DYvfe0UmDUvTkHWbv+hFPy0 XweI/rBqDYypJ+QOeARRdDLf2GqZUW7dqyJn8YB36TiJZx1kKm7JsRXuju/9eO01adDb KwoaaSOtUgmNzi5BPbUMWWdCtytqQNEpTpS9b0Dpc8WkJXGQiYV7Hdgq61lzDEnTcI3Z 2aFeS4jQjeklMsZ9EK/Y6jmVQOMskEgHTdmRTm+ZpBeTq0kgrMRtRY2Hp+VJfQDCBHwT Twhw== X-Gm-Message-State: ALoCoQn473yhJEj3jou2qN0D01z6erW9qCTLj4sW2T+ikIn3suzDKTk0JdszuUSFJGzTj/Z2uym6 X-Received: by 10.112.247.11 with SMTP id ya11mr2569013lbc.28.1409215152979; Thu, 28 Aug 2014 01:39:12 -0700 (PDT) Received: from uffe-Latitude-E6430s.lan (90-231-160-185-no158.tbcn.telia.com. [90.231.160.185]) by mx.google.com with ESMTPSA id t12sm4826676lbp.44.2014.08.28.01.39.10 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 28 Aug 2014 01:39:12 -0700 (PDT) From: Ulf Hansson To: "Rafael J. Wysocki" , Len Brown , Pavel Machek , Greg Kroah-Hartman , linux-pm@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, Geert Uytterhoeven , Kevin Hilman , Alan Stern , Daniel Lezcano , Tomasz Figa , devicetree@vger.kernel.org, Linus Walleij , Simon Horman , Magnus Damm , Ben Dooks , Kukjin Kim , Stephen Boyd , Philipp Zabel , Mark Brown , Wolfram Sang , Chris Ball , Russell King , Ulf Hansson Subject: [PATCH v2 1/9] ACPI / PM: Let acpi_dev_pm_detach() return an error code Date: Thu, 28 Aug 2014 10:38:54 +0200 Message-Id: <1409215142-8218-2-git-send-email-ulf.hansson@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1409215142-8218-1-git-send-email-ulf.hansson@linaro.org> References: <1409215142-8218-1-git-send-email-ulf.hansson@linaro.org> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP To give callers the option of acting on a errors while removing the pm_domain ops for the device in the ACPI PM domain, let acpi_dev_pm_detach() return an int to provide the error code. Signed-off-by: Ulf Hansson Tested-by: Philipp Zabel --- drivers/acpi/device_pm.c | 8 +++++++- include/linux/acpi.h | 7 +++++-- 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index 67075f8..0d52ce1 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -1055,6 +1055,8 @@ static struct dev_pm_domain acpi_general_pm_domain = { * * Callers must ensure proper synchronization of this function with power * management callbacks. + * + * Returns 0 on successfully attached PM domain or negative error code. */ int acpi_dev_pm_attach(struct device *dev, bool power_on) { @@ -1087,8 +1089,10 @@ EXPORT_SYMBOL_GPL(acpi_dev_pm_attach); * * Callers must ensure proper synchronization of this function with power * management callbacks. + * + * Returns 0 on successfully detached PM domain or negative error code. */ -void acpi_dev_pm_detach(struct device *dev, bool power_off) +int acpi_dev_pm_detach(struct device *dev, bool power_off) { struct acpi_device *adev = ACPI_COMPANION(dev); @@ -1107,7 +1111,9 @@ void acpi_dev_pm_detach(struct device *dev, bool power_off) acpi_device_wakeup(adev, ACPI_STATE_S0, false); acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0); } + return 0; } + return -EINVAL; } EXPORT_SYMBOL_GPL(acpi_dev_pm_detach); #endif /* CONFIG_PM */ diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 807cbc4..c83cca5 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -587,7 +587,7 @@ static inline int acpi_subsys_freeze(struct device *dev) { return 0; } #if defined(CONFIG_ACPI) && defined(CONFIG_PM) struct acpi_device *acpi_dev_pm_get_node(struct device *dev); int acpi_dev_pm_attach(struct device *dev, bool power_on); -void acpi_dev_pm_detach(struct device *dev, bool power_off); +int acpi_dev_pm_detach(struct device *dev, bool power_off); #else static inline struct acpi_device *acpi_dev_pm_get_node(struct device *dev) { @@ -597,7 +597,10 @@ static inline int acpi_dev_pm_attach(struct device *dev, bool power_on) { return -ENODEV; } -static inline void acpi_dev_pm_detach(struct device *dev, bool power_off) {} +static inline int acpi_dev_pm_detach(struct device *dev, bool power_off) +{ + return -ENODEV; +} #endif #ifdef CONFIG_ACPI