linux-kernel - [PATCH 12/19] cpufreq: raspberrypi: Convert to platform remove callback returning void

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Message-Id: <20230712093322.37322-12-frank.li@vivo.com>
Date:   Wed, 12 Jul 2023 17:33:15 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>
Cc:     Yangtao Li <frank.li@...o.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, linux-pm@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 12/19] cpufreq: raspberrypi: 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/cpufreq/raspberrypi-cpufreq.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/cpufreq/raspberrypi-cpufreq.c b/drivers/cpufreq/raspberrypi-cpufreq.c
index 2bc7d9734272..e0705cc9a57d 100644
--- a/drivers/cpufreq/raspberrypi-cpufreq.c
+++ b/drivers/cpufreq/raspberrypi-cpufreq.c
@@ -65,7 +65,7 @@ static int raspberrypi_cpufreq_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int raspberrypi_cpufreq_remove(struct platform_device *pdev)
+static void raspberrypi_cpufreq_remove(struct platform_device *pdev)
 {
 	struct device *cpu_dev;
 
@@ -74,8 +74,6 @@ static int raspberrypi_cpufreq_remove(struct platform_device *pdev)
 		dev_pm_opp_remove_all_dynamic(cpu_dev);
 
 	platform_device_unregister(cpufreq_dt);
-
-	return 0;
 }
 
 /*
@@ -87,7 +85,7 @@ static struct platform_driver raspberrypi_cpufreq_driver = {
 		.name = "raspberrypi-cpufreq",
 	},
 	.probe          = raspberrypi_cpufreq_probe,
-	.remove		= raspberrypi_cpufreq_remove,
+	.remove_new	= raspberrypi_cpufreq_remove,
 };
 module_platform_driver(raspberrypi_cpufreq_driver);
 
-- 
2.39.0