linux-kernel - [PATCH v1] thermal/debugfs: Make tze_seq_show() skip invalid trips and trips with no stats

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Date: Wed, 17 Apr 2024 17:51:29 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>, Lukasz Luba <lukasz.luba@....com>,
 LKML <linux-kernel@...r.kernel.org>
Subject:
 [PATCH v1] thermal/debugfs: Make tze_seq_show() skip invalid trips and trips
 with no stats

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

Currently, tze_seq_show() output includes all of the trips in the zone
except for critical ones, including invalid trips and trips with no stats
which is confusing.

Make it skip the trips for which there is not mitigation information.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---

This is independent of the other thermal patches sent by me recently.

---
 drivers/thermal/thermal_debugfs.c |   22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

Index: linux-pm/drivers/thermal/thermal_debugfs.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_debugfs.c
+++ linux-pm/drivers/thermal/thermal_debugfs.c
@@ -754,6 +754,11 @@ static int tze_seq_show(struct seq_file
 
 	for_each_trip_desc(tz, td) {
 		const struct thermal_trip *trip = &td->trip;
+		struct trip_stats *trip_stats;
+
+		/* Skip invalid trips. */
+		if (trip->temperature == THERMAL_TEMP_INVALID)
+			continue;
 
 		/*
 		 * There is no possible mitigation happening at the
@@ -763,6 +768,13 @@ static int tze_seq_show(struct seq_file
 		if (trip->type == THERMAL_TRIP_CRITICAL)
 			continue;
 
+		trip_id = thermal_zone_trip_id(tz, trip);
+		trip_stats = &tze->trip_stats[trip_id];
+
+		/* Skip trips without any stats. */
+		if (trip_stats->min > trip_stats->max)
+			continue;
+
 		if (trip->type == THERMAL_TRIP_PASSIVE)
 			type = "passive";
 		else if (trip->type == THERMAL_TRIP_ACTIVE)
@@ -770,17 +782,15 @@ static int tze_seq_show(struct seq_file
 		else
 			type = "hot";
 
-		trip_id = thermal_zone_trip_id(tz, trip);
-
 		seq_printf(s, "| %*d | %*s | %*d | %*d | %*lld | %*d | %*d | %*d |\n",
 			   4 , trip_id,
 			   8, type,
 			   9, trip->temperature,
 			   9, trip->hysteresis,
-			   10, ktime_to_ms(tze->trip_stats[trip_id].duration),
-			   9, tze->trip_stats[trip_id].avg,
-			   9, tze->trip_stats[trip_id].min,
-			   9, tze->trip_stats[trip_id].max);
+			   10, ktime_to_ms(trip_stats->duration),
+			   9, trip_stats->avg,
+			   9, trip_stats->min,
+			   9, trip_stats->max);
 	}
 
 	return 0;