Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753760AbdDLJNn (ORCPT ); Wed, 12 Apr 2017 05:13:43 -0400 Received: from fllnx210.ext.ti.com ([198.47.19.17]:34844 "EHLO fllnx210.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752805AbdDLJNj (ORCPT ); Wed, 12 Apr 2017 05:13:39 -0400 From: Keerthy To: , CC: , , , , , Subject: [PATCH] thermal: core: Allow orderly_poweroff to be called only once Date: Wed, 12 Apr 2017 14:42:12 +0530 Message-ID: <1491988332-13398-1-git-send-email-j-keerthy@ti.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1774 Lines: 50 thermal_zone_device_check --> thermal_zone_device_update --> handle_thermal_trip --> handle_critical_trips --> orderly_poweroff The above sequence happens every 250/500 mS based on the configuration. The orderly_poweroff function is getting called every 250/500 mS. With a full fledged file system it takes at least 5-10 Seconds to power off gracefully. In that period due to the thermal_zone_device_check triggering periodically the thermal work queues bombard with orderly_poweroff calls multiple times eventually leading to failures in gracefully powering off the system. Make sure that orderly_poweroff is called only once. Fixes: 0c01ebbfd3caf1d ("Thermal: Remove throttling logic out of thermal_sys.c") Reported-by: Nishanth Menon Signed-off-by: Keerthy --- drivers/thermal/thermal_core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 11f0675..4e68ce0 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -326,6 +326,7 @@ static void handle_critical_trips(struct thermal_zone_device *tz, int trip, enum thermal_trip_type trip_type) { int trip_temp; + static bool power_off_triggered; tz->ops->get_trip_temp(tz, trip, &trip_temp); @@ -338,11 +339,12 @@ static void handle_critical_trips(struct thermal_zone_device *tz, if (tz->ops->notify) tz->ops->notify(tz, trip, trip_type); - if (trip_type == THERMAL_TRIP_CRITICAL) { + if (trip_type == THERMAL_TRIP_CRITICAL && !power_off_triggered) { dev_emerg(&tz->device, "critical temperature reached(%d C),shutting down\n", tz->temperature / 1000); orderly_poweroff(true); + power_off_triggered = true; } } -- 1.9.1