From patchwork Tue Apr 7 17:49:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrzej Pietrasiewicz X-Patchwork-Id: 11478519 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F405F913 for ; Tue, 7 Apr 2020 17:49:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D737520771 for ; Tue, 7 Apr 2020 17:49:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726778AbgDGRt5 (ORCPT ); Tue, 7 Apr 2020 13:49:57 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:43100 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726760AbgDGRt4 (ORCPT ); Tue, 7 Apr 2020 13:49:56 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: andrzej.p) with ESMTPSA id 326AA2972B4 From: Andrzej Pietrasiewicz To: linux-pm@vger.kernel.org Cc: Zhang Rui , "Rafael J . Wysocki" , Len Brown , Jiri Pirko , Ido Schimmel , "David S . Miller" , Peter Kaestle , Darren Hart , Andy Shevchenko , Support Opensource , Daniel Lezcano , Amit Kucheria , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Allison Randal , Enrico Weigelt , Gayatri Kammela , Thomas Gleixner , linux-acpi@vger.kernel.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, Andrzej Pietrasiewicz Subject: [RFC 8/8] thermal: Stop polling DISABLED thermal devices Date: Tue, 7 Apr 2020 19:49:26 +0200 Message-Id: <20200407174926.23971-9-andrzej.p@collabora.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200407174926.23971-1-andrzej.p@collabora.com> References: <20200407174926.23971-1-andrzej.p@collabora.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Polling DISABLED devices is not desired, as all such "disabled" devices are meant to be handled by userspace. Signed-off-by: Andrzej Pietrasiewicz --- drivers/thermal/thermal_core.c | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index aae2b049d45c..f74b7a792be7 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -305,13 +305,32 @@ static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, cancel_delayed_work(&tz->poll_queue); } +static bool should_stop_polling(struct thermal_zone_device *tz) +{ + enum thermal_device_mode mode; + int result; + + if (!tz->ops->get_mode) + return false; + + result = tz->ops->get_mode(tz, &mode); + if (result) + return false; + + return mode == THERMAL_DEVICE_DISABLED; +} + static void monitor_thermal_zone(struct thermal_zone_device *tz) { + bool stop; + + stop = should_stop_polling(tz); + mutex_lock(&tz->lock); - if (tz->passive) + if (!stop && tz->passive) thermal_zone_device_set_polling(tz, tz->passive_delay); - else if (tz->polling_delay) + else if (!stop && tz->polling_delay) thermal_zone_device_set_polling(tz, tz->polling_delay); else thermal_zone_device_set_polling(tz, 0); @@ -500,6 +519,9 @@ void thermal_zone_device_update(struct thermal_zone_device *tz, { int count; + if (should_stop_polling(tz)) + return; + if (atomic_read(&in_suspend)) return;