linux-kernel - [PATCH v3 6/6] thermal: core: Relocate critical and hot trip handling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <3556878.iIbC2pHGDl@kreacher>
Date: Tue, 02 Apr 2024 21:04:28 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
 Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
 Daniel Lezcano <daniel.lezcano@...aro.org>,
 Lukasz Luba <lukasz.luba@....com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v3 6/6] thermal: core: Relocate critical and hot trip handling

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Modify handle_thermal_trip() to call handle_critical_trips() only after
finding that the trip temperature has been crossed on the way up and
remove the redundant temperature check from the latter.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/thermal/thermal_core.c |   15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

Index: linux-pm/drivers/thermal/thermal_core.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_core.c
+++ linux-pm/drivers/thermal/thermal_core.c
@@ -349,10 +349,6 @@ void thermal_zone_device_critical_reboot
 static void handle_critical_trips(struct thermal_zone_device *tz,
 				  const struct thermal_trip *trip)
 {
-	/* If we have not crossed the trip_temp, we do not care. */
-	if (trip->temperature <= 0 || tz->temperature < trip->temperature)
-		return;
-
 	trace_thermal_zone_trip(tz, thermal_zone_trip_id(tz, trip), trip->type);

 	if (trip->type == THERMAL_TRIP_CRITICAL)
@@ -404,12 +400,15 @@ static void handle_thermal_trip(struct t
 		list_add_tail(&td->notify_list_node, way_up_list);
 		td->notify_temp = trip->temperature;
 		td->threshold -= trip->hysteresis;
+
+		if (trip->type == THERMAL_TRIP_CRITICAL ||
+		    trip->type == THERMAL_TRIP_HOT) {
+			handle_critical_trips(tz, trip);
+			return;
+		}
 	}

-	if (trip->type == THERMAL_TRIP_CRITICAL || trip->type == THERMAL_TRIP_HOT)
-		handle_critical_trips(tz, trip);
-	else
-		handle_non_critical_trips(tz, trip);
+	handle_non_critical_trips(tz, trip);
 }

 static void update_temperature(struct thermal_zone_device *tz)