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From:   =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= 
        <u.kleine-koenig@pengutronix.de>
To:     Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <brgl@bgdev.pl>
Cc:     Andy Shevchenko <andy@kernel.org>, linux-gpio@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH 13/23] gpio: mpc8xxx: Convert to platform remove callback returning void
Date:   Thu, 28 Sep 2023 09:06:56 +0200
Message-Id: <20230928070706.2290137-14-u.kleine-koenig@pengutronix.de>
In-Reply-To: <20230928070706.2290137-1-u.kleine-koenig@pengutronix.de>
References: <20230928070706.2290137-1-u.kleine-koenig@pengutronix.de>
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Precedence: bulk

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 ignored (apart
from emitting a warning) 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. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

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

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/gpio/gpio-mpc8xxx.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index ebf2f511df59..c0125ac73906 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -419,7 +419,7 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mpc8xxx_remove(struct platform_device *pdev)
+static void mpc8xxx_remove(struct platform_device *pdev)
 {
 	struct mpc8xxx_gpio_chip *mpc8xxx_gc = platform_get_drvdata(pdev);
 
@@ -427,8 +427,6 @@ static int mpc8xxx_remove(struct platform_device *pdev)
 		irq_set_chained_handler_and_data(mpc8xxx_gc->irqn, NULL, NULL);
 		irq_domain_remove(mpc8xxx_gc->irq);
 	}
-
-	return 0;
 }
 
 #ifdef CONFIG_ACPI
@@ -441,7 +439,7 @@ MODULE_DEVICE_TABLE(acpi, gpio_acpi_ids);
 
 static struct platform_driver mpc8xxx_plat_driver = {
 	.probe		= mpc8xxx_probe,
-	.remove		= mpc8xxx_remove,
+	.remove_new	= mpc8xxx_remove,
 	.driver		= {
 		.name = "gpio-mpc8xxx",
 		.of_match_table	= mpc8xxx_gpio_ids,
-- 
2.40.1