linux-kernel - [PATCH 2/7] thermal: gov_power_allocator: Setup trip points earlier

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Date:   Wed, 25 Oct 2023 20:22:20 +0100
From:   Lukasz Luba <lukasz.luba@....com>
To:     linux-kernel@...r.kernel.org, daniel.lezcano@...aro.org,
        rafael@...nel.org
Cc:     linux-pm@...r.kernel.org, rui.zhang@...el.com, lukasz.luba@....com
Subject: [PATCH 2/7] thermal: gov_power_allocator: Setup trip points earlier

Setup the trip points at the beginning of the binding function. This
simplifies the code a bit and allows further cleaning. Add also the
check if the last passive trip point is found and fail binding if not.

Signed-off-by: Lukasz Luba <lukasz.luba@....com>
---
 drivers/thermal/gov_power_allocator.c | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/thermal/gov_power_allocator.c b/drivers/thermal/gov_power_allocator.c
index 97a8a6e4e1b0b..0dfc5b5ab5235 100644
--- a/drivers/thermal/gov_power_allocator.c
+++ b/drivers/thermal/gov_power_allocator.c
@@ -617,14 +617,24 @@ static int power_allocator_bind(struct thermal_zone_device *tz)
 	int ret;
 	struct power_allocator_params *params;
 
-	ret = check_power_actors(tz);
-	if (ret)
-		return ret;
-
 	params = kzalloc(sizeof(*params), GFP_KERNEL);
 	if (!params)
 		return -ENOMEM;
 
+	get_governor_trips(tz, params);
+	if (!params->trip_max) {
+		dev_warn(&tz->device, "power_allocator: missing trip_max\n");
+		kfree(params);
+		return -EINVAL;
+	}
+
+	ret = check_power_actors(tz);
+	if (ret) {
+		dev_warn(&tz->device, "power_allocator: binding failed\n");
+		kfree(params);
+		return ret;
+	}
+
 	if (!tz->tzp) {
 		tz->tzp = kzalloc(sizeof(*tz->tzp), GFP_KERNEL);
 		if (!tz->tzp) {
@@ -638,12 +648,9 @@ static int power_allocator_bind(struct thermal_zone_device *tz)
 	if (!tz->tzp->sustainable_power)
 		dev_warn(&tz->device, "power_allocator: sustainable_power will be estimated\n");
 
-	get_governor_trips(tz, params);
-
-	if (params->trip_max)
-		estimate_pid_constants(tz, tz->tzp->sustainable_power,
-				       params->trip_switch_on,
-				       params->trip_max->temperature);
+	estimate_pid_constants(tz, tz->tzp->sustainable_power,
+			       params->trip_switch_on,
+			       params->trip_max->temperature);
 
 	reset_pid_controller(params);
 
-- 
2.25.1