linux-kernel - [PATCH 04/27] drivers/thermal/rcar_gen3_thermal: Convert to platform remove callback returning void

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Message-Id: <20230712081258.29254-4-frank.li@vivo.com>
Date:   Wed, 12 Jul 2023 16:12:35 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Niklas Söderlund <niklas.soderlund@...natech.se>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>
Cc:     Yangtao Li <frank.li@...o.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        linux-renesas-soc@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 04/27] drivers/thermal/rcar_gen3_thermal: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Cc: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 drivers/thermal/rcar_gen3_thermal.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c
index 9029d01e029b..1405163caa34 100644
--- a/drivers/thermal/rcar_gen3_thermal.c
+++ b/drivers/thermal/rcar_gen3_thermal.c
@@ -432,14 +432,12 @@ static const struct of_device_id rcar_gen3_thermal_dt_ids[] = {
 };
 MODULE_DEVICE_TABLE(of, rcar_gen3_thermal_dt_ids);
 
-static int rcar_gen3_thermal_remove(struct platform_device *pdev)
+static void rcar_gen3_thermal_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 
 	pm_runtime_put(dev);
 	pm_runtime_disable(dev);
-
-	return 0;
 }
 
 static void rcar_gen3_hwmon_action(void *data)
@@ -594,7 +592,7 @@ static struct platform_driver rcar_gen3_thermal_driver = {
 		.of_match_table = rcar_gen3_thermal_dt_ids,
 	},
 	.probe		= rcar_gen3_thermal_probe,
-	.remove		= rcar_gen3_thermal_remove,
+	.remove_new	= rcar_gen3_thermal_remove,
 };
 module_platform_driver(rcar_gen3_thermal_driver);
 
-- 
2.39.0