linux-kernel - [PATCH 3/7] thermal: of: Use scoped device node handling to simplify of_thermal_zone

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Message-Id: <20240814-b4-cleanup-h-of-node-put-thermal-v1-3-7a1381e1627e@linaro.org>
Date: Wed, 14 Aug 2024 22:17:49 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>, 
 Daniel Lezcano <daniel.lezcano@...aro.org>, Zhang Rui <rui.zhang@...el.com>, 
 Lukasz Luba <lukasz.luba@....com>, Amit Kucheria <amitk@...nel.org>, 
 Thara Gopinath <thara.gopinath@...il.com>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>, 
 Vasily Khoruzhick <anarsoul@...il.com>, Yangtao Li <tiny.windzz@...il.com>, 
 Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, linux-tegra@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH 3/7] thermal: of: Use scoped device node handling to
 simplify of_thermal_zone_find()

Obtain the device node reference with scoped/cleanup.h to reduce error
handling and make the code a bit simpler.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

This depends on my earlier fixes:

https://lore.kernel.org/all/20240814195823.437597-1-krzysztof.kozlowski@linaro.org/
---
 drivers/thermal/thermal_of.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index c8ded4462bb8..fb5472d6ffea 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -157,10 +157,9 @@ static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *n

 static struct device_node *of_thermal_zone_find(struct device_node *sensor, int id)
 {
-	struct device_node *np, *tz;
 	struct of_phandle_args sensor_specs;

-	np = of_find_node_by_name(NULL, "thermal-zones");
+	struct device_node *np __free(device_node) = of_find_node_by_name(NULL, "thermal-zones");
 	if (!np) {
 		pr_debug("No thermal zones description\n");
 		return ERR_PTR(-ENODEV);
@@ -178,8 +177,7 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int
 						   "#thermal-sensor-cells");
 		if (count <= 0) {
 			pr_err("%pOFn: missing thermal sensor\n", child);
-			tz = ERR_PTR(-EINVAL);
-			goto out;
+			return ERR_PTR(-EINVAL);
 		}

 		for (i = 0; i < count; i++) {
@@ -191,22 +189,18 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int
 							 i, &sensor_specs);
 			if (ret < 0) {
 				pr_err("%pOFn: Failed to read thermal-sensors cells: %d\n", child, ret);
-				tz = ERR_PTR(ret);
-				goto out;
+				return ERR_PTR(ret);
 			}

 			if ((sensor == sensor_specs.np) && id == (sensor_specs.args_count ?
 								  sensor_specs.args[0] : 0)) {
 				pr_debug("sensor %pOFn id=%d belongs to %pOFn\n", sensor, id, child);
-				tz = no_free_ptr(child);
-				goto out;
+				return no_free_ptr(child);
 			}
 		}
 	}
-	tz = ERR_PTR(-ENODEV);
-out:
-	of_node_put(np);
-	return tz;
+
+	return ERR_PTR(-ENODEV);
 }

 static int thermal_of_monitor_init(struct device_node *np, int *delay, int *pdelay)

-- 
2.43.0