From patchwork Tue Mar 21 15:46:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhang, Rui" X-Patchwork-Id: 665755 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 2BB4BC6FD1D for ; Tue, 21 Mar 2023 15:46:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230425AbjCUPqo (ORCPT ); Tue, 21 Mar 2023 11:46:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58194 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230478AbjCUPqn (ORCPT ); Tue, 21 Mar 2023 11:46:43 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8542B2ED53; Tue, 21 Mar 2023 08:46:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679413598; x=1710949598; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=yMZXccUu1lBAd8v18L5Z/TESPdIfHYj6uBIHlG8Q0SM=; b=bvgnoBTr+OE2TX1zmWXTrgYMk2Qwnzcyzf7XOL9dsilnQoRJboXjPgc7 RNxt54KFlkgsuBHa/mW08T08YRRetmRXg49OlU41jQCtg3micXTcY/4sQ jFR94uS7CYoVXZIYvRKYWD/VCUE1bqsP8IXFixu/MiVieaEpj7NJiiJKd 5oriMeZW2iaZw7wj1VdrF5VAMg6SQ+CJnUh47HGwXi+s/eIjCZe2+eo8f itWTOXJcGUq0sVIiBfVUAClELYPTc4Ptk7vWTrwHY6wi/yFZGC+lazNdM +arHZuP6+/4SjIod+kI9HAxr9S/lUWo5+NqEUn9XIURUvypj7LJK6c54V w==; X-IronPort-AV: E=McAfee;i="6600,9927,10656"; a="339014467" X-IronPort-AV: E=Sophos;i="5.98,279,1673942400"; d="scan'208";a="339014467" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Mar 2023 08:46:38 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10656"; a="683913453" X-IronPort-AV: E=Sophos;i="5.98,279,1673942400"; d="scan'208";a="683913453" Received: from gongzhi-mobl1.ccr.corp.intel.com (HELO rzhang1-DESK.intel.com) ([10.254.214.88]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Mar 2023 08:46:36 -0700 From: Zhang Rui To: linux-pm@vger.kernel.org, rafael.j.wysocki@intel.com, daniel.lezcano@linaro.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH] thermal/core: update cooling device during thermal zone unregistration Date: Tue, 21 Mar 2023 23:46:27 +0800 Message-Id: <20230321154627.17787-1-rui.zhang@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org When unregistering a thermal zone device, update the cooling device in case the cooling device is activated by the current thermal zone. This fixes a problem that the frequency of ACPI processors are still limited after unloading ACPI thermal driver while ACPI passive cooling is activated. Signed-off-by: Zhang Rui --- drivers/thermal/thermal_core.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index cfd4c1afeae7..9f120e3c9bf0 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1477,6 +1477,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) const struct thermal_zone_params *tzp; struct thermal_cooling_device *cdev; struct thermal_zone_device *pos = NULL; + struct thermal_instance *ti; if (!tz) return; @@ -1497,9 +1498,22 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) /* Unbind all cdevs associated with 'this' thermal zone */ list_for_each_entry(cdev, &thermal_cdev_list, node) { + mutex_lock(&tz->lock); + list_for_each_entry(ti, &tz->thermal_instances, tz_node) { + if (ti->cdev == cdev) + break; + } + + /* The cooling device is not used by current thermal zone */ + if (ti->cdev != cdev) { + mutex_unlock(&tz->lock); + continue; + } + mutex_unlock(&tz->lock); + if (tz->ops->unbind) { tz->ops->unbind(tz, cdev); - continue; + goto deactivate_cdev; } if (!tzp || !tzp->tbp) @@ -1511,6 +1525,16 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) tzp->tbp[i].cdev = NULL; } } + +deactivate_cdev: + /* + * The thermal instances for current thermal zone has been + * removed. Update the cooling device in case it is activated + * by current thermal zone device. + */ + mutex_lock(&cdev->lock); + __thermal_cdev_update(cdev); + mutex_unlock(&cdev->lock); } mutex_unlock(&thermal_list_lock);