Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752576AbbBXEfY (ORCPT ); Mon, 23 Feb 2015 23:35:24 -0500 Received: from cantor2.suse.de ([195.135.220.15]:34335 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752426AbbBXEfS (ORCPT ); Mon, 23 Feb 2015 23:35:18 -0500 From: NeilBrown To: Samuel Ortiz , Tony Lindgren , Lee Jones , Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse Date: Tue, 24 Feb 2015 15:33:50 +1100 Subject: [PATCH 01/15] power_supply core: support use of devres to register/unregister a power supply. Cc: GTA04 owners , linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Message-ID: <20150224043350.4243.92949.stgit@notabene.brown> In-Reply-To: <20150224043341.4243.23291.stgit@notabene.brown> References: <20150224043341.4243.23291.stgit@notabene.brown> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2794 Lines: 87 Using devm_power_supply_register allows the unregister to happen automatically on error or final put. Signed-off-by: NeilBrown --- drivers/power/power_supply_core.c | 45 +++++++++++++++++++++++++++++++++++++ include/linux/power_supply.h | 4 +++ 2 files changed, 49 insertions(+) diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c index 694e8cddd5c1..44c810456212 100644 --- a/drivers/power/power_supply_core.c +++ b/drivers/power/power_supply_core.c @@ -617,6 +617,51 @@ int power_supply_register_no_ws(struct device *parent, struct power_supply *psy) } EXPORT_SYMBOL_GPL(power_supply_register_no_ws); +static void devm_power_supply_release(struct device *dev, void *res) +{ + struct power_supply **psy = res; + + power_supply_unregister(*psy); +} + +int devm_power_supply_register(struct device *parent, struct power_supply *psy) +{ + struct power_supply **ptr = devres_alloc(devm_power_supply_release, + sizeof(*ptr), GFP_KERNEL); + int ret; + + if (!ptr) + return -ENOMEM; + ret = __power_supply_register(parent, psy, true); + if (ret < 0) + devres_free(ptr); + else { + *ptr = psy; + devres_add(parent, ptr); + } + return ret; +} +EXPORT_SYMBOL_GPL(devm_power_supply_register); + +int devm_power_supply_register_no_ws(struct device *parent, struct power_supply *psy) +{ + struct power_supply **ptr = devres_alloc(devm_power_supply_release, + sizeof(*ptr), GFP_KERNEL); + int ret; + + if (!ptr) + return -ENOMEM; + ret = __power_supply_register(parent, psy, false); + if (ret < 0) + devres_free(ptr); + else { + *ptr = psy; + devres_add(parent, ptr); + } + return ret; +} +EXPORT_SYMBOL_GPL(devm_power_supply_register_no_ws); + void power_supply_unregister(struct power_supply *psy) { cancel_work_sync(&psy->changed_work); diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index 096dbced02ac..f606d6b4bd56 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -278,6 +278,10 @@ extern int power_supply_register(struct device *parent, struct power_supply *psy); extern int power_supply_register_no_ws(struct device *parent, struct power_supply *psy); +extern int devm_power_supply_register(struct device *parent, + struct power_supply *psy); +extern int devm_power_supply_register_no_ws(struct device *parent, + struct power_supply *psy); extern void power_supply_unregister(struct power_supply *psy); extern int power_supply_powers(struct power_supply *psy, struct device *dev); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/