From patchwork Mon Apr 10 20:53:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Lezcano X-Patchwork-Id: 13206728 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CFC9BC77B61 for ; Mon, 10 Apr 2023 20:53:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229703AbjDJUxt (ORCPT ); Mon, 10 Apr 2023 16:53:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37470 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229851AbjDJUxq (ORCPT ); Mon, 10 Apr 2023 16:53:46 -0400 Received: from mail-wr1-x432.google.com (mail-wr1-x432.google.com [IPv6:2a00:1450:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54CC21BC2 for ; Mon, 10 Apr 2023 13:53:44 -0700 (PDT) Received: by mail-wr1-x432.google.com with SMTP id i27so5514838wrc.1 for ; Mon, 10 Apr 2023 13:53:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1681160023; x=1683752023; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=zP0ai9WWz0txuIScl5+cGxEFfYcMtPVS0xCm4H0j7Sc=; b=SwtFaLlLUJ8uK7PCs+p+9q2jmdDGcKVwq2VZsU/IWs58GUENqqElwlgMGZ8UaUJnBN qhClHoISI+1Q+k54FGd0ILwM0AaILv4BEY6f6wGumB1/QaMe/E5yzf2QwGCRg6g0V+J4 +SYHG056WUkzc76xWr+JpQPIc/4TNc7EClWhBAgWxYnzci8x+cqaeyBmNSJNUt4jS7jr yvw4SLUl/EV/lpVNbcPESPb+bwTB7k6RzUalSe2TW6D0WZyh1U5cf5ZMFO1caNcX3zop nlJjUg9bm+RA2xIL2wNZGtGgntUmwIkGnHtrzTmATfu2Wit7szggjPGQqw28k1jsyxi0 il1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1681160023; x=1683752023; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=zP0ai9WWz0txuIScl5+cGxEFfYcMtPVS0xCm4H0j7Sc=; b=ManryFrZknuWR3U4SUdcGEgextd3aE7U0X4oajwzVq2jzhuid/ZwFcoM/Uq5QX62g1 9dXfG5IGhRc+aYD6u18e2z0fCaP8xbVvVAVNkpv/bkoOhBfBt782qNbOvMBD1tTcy5We STPuOtMrGvzSEQm1WbWbgcfD2SMvqHuX4J0scc852VJRE7HWLgpsznB0eHxFVlHeR/gm vv8XUlBPB8EaWlXkIqLpUlabwrRV8UJnc4UIxmyRa5TYKGYcBYnjE9DvWDs9r58tmune ehGoTIkJxUwh+RzIMp72qId5tO3GQnpo+aeCylVnRcCqlRXn/ZYAIkQ1R3HIYQRJ1VYJ wPfw== X-Gm-Message-State: AAQBX9dK5+XquYdQyMP6mKifVtx7LoP5Tes5LqAII7ZBiuriXvNLZXHu HT9FWcqAmGSB4MvVMnQxWHUSCA== X-Google-Smtp-Source: AKy350ZlNr1Ggj7t/rY1NAQx6q6DjJGKetJtVt34ctysK9zRe75QqXeVNlKWq//6kKmGhE+P5XLt2w== X-Received: by 2002:a5d:544b:0:b0:2c5:3cd2:b8e with SMTP id w11-20020a5d544b000000b002c53cd20b8emr5478341wrv.1.1681160022744; Mon, 10 Apr 2023 13:53:42 -0700 (PDT) Received: from mai.box.freepro.com ([2a05:6e02:1041:c10:2611:592:3b9e:d2ae]) by smtp.gmail.com with ESMTPSA id e17-20020adffc51000000b002ef2e148d59sm11966789wrs.16.2023.04.10.13.53.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Apr 2023 13:53:42 -0700 (PDT) From: Daniel Lezcano To: daniel.lezcano@linaro.org, rafael@kernel.org Cc: rui.zhang@intel.com, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Len Brown , linux-acpi@vger.kernel.org (open list:ACPI THERMAL DRIVER) Subject: [PATCH v2 6/7] thermal/drivers/acpi: Make cross dev link optional by configuration Date: Mon, 10 Apr 2023 22:53:04 +0200 Message-Id: <20230410205305.1649678-7-daniel.lezcano@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230410205305.1649678-1-daniel.lezcano@linaro.org> References: <20230410205305.1649678-1-daniel.lezcano@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org The ACPI thermal driver creates a link in the thermal zone device sysfs directory pointing to the device sysfs directory. At the same time, it creates a back pointer link from the device to the thermal zone device sysfs directory. From a generic perspective, having a device pointer in the sysfs thermal zone directory may make sense. But the opposite is not true as the same driver can be related to multiple thermal zones. The usage of these information is very specific to ACPI and it is questionable if they are really needed. Let's make the code optional and disable it by default. Signed-off-by: Daniel Lezcano --- drivers/acpi/thermal.c | 62 ++++++++++++++++++++++++++++-------------- 1 file changed, 42 insertions(+), 20 deletions(-) diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 5763db4528b8..70f1d28810f2 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -787,9 +787,44 @@ static struct thermal_zone_device_ops acpi_thermal_zone_ops = { .critical = acpi_thermal_zone_device_critical, }; +#ifdef CONFIG_THERMAL_SYSFS_OBSOLETE_SINGULARITY +static int acpi_thermal_zone_sysfs_add(struct acpi_thermal *tz) +{ + struct device *tzdev = thermal_zone_device(tz->thermal_zone); + int ret; + + ret = sysfs_create_link(&tz->device->dev.kobj, + &tzdev->kobj, "thermal_zone"); + if (ret) + return ret; + + ret = sysfs_create_link(&tzdev->kobj, + &tz->device->dev.kobj, "device"); + if (ret) + sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); + + return ret; +} + +static void acpi_thermal_zone_sysfs_remove(struct acpi_thermal *tz) +{ + struct device *tzdev = thermal_zone_device(tz->thermal_zone); + + sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); + sysfs_remove_link(&tzdev->kobj, "device"); +} +#else +static inline int acpi_thermal_zone_sysfs_add(struct acpi_thermal *tz) +{ + return 0; +} +static inline void acpi_thermal_zone_sysfs_remove(struct acpi_thermal *tz) +{ +} +#endif + static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) { - struct device *tzdev; int trips = 0; int result; acpi_status status; @@ -821,23 +856,15 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) if (IS_ERR(tz->thermal_zone)) return -ENODEV; - tzdev = thermal_zone_device(tz->thermal_zone); - - result = sysfs_create_link(&tz->device->dev.kobj, - &tzdev->kobj, "thermal_zone"); + result = acpi_thermal_zone_sysfs_add(tz); if (result) goto unregister_tzd; - - result = sysfs_create_link(&tzdev->kobj, - &tz->device->dev.kobj, "device"); - if (result) - goto remove_tz_link; - + status = acpi_bus_attach_private_data(tz->device->handle, tz->thermal_zone); if (ACPI_FAILURE(status)) { result = -ENODEV; - goto remove_dev_link; + goto remove_links; } result = thermal_zone_device_enable(tz->thermal_zone); @@ -851,10 +878,8 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) acpi_bus_detach: acpi_bus_detach_private_data(tz->device->handle); -remove_dev_link: - sysfs_remove_link(&tzdev->kobj, "device"); -remove_tz_link: - sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); +remove_links: + acpi_thermal_zone_sysfs_remove(tz); unregister_tzd: thermal_zone_device_unregister(tz->thermal_zone); @@ -863,10 +888,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz) static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz) { - struct device *tzdev = thermal_zone_device(tz->thermal_zone); - - sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone"); - sysfs_remove_link(&tzdev->kobj, "device"); + acpi_thermal_zone_sysfs_remove(tz); thermal_zone_device_unregister(tz->thermal_zone); tz->thermal_zone = NULL; acpi_bus_detach_private_data(tz->device->handle);