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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 17/23] gpio: tb10x: Convert to platform remove callback returning void
Date:   Thu, 28 Sep 2023 09:07:00 +0200
Message-Id: <20230928070706.2290137-18-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-tb10x.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-tb10x.c b/drivers/gpio/gpio-tb10x.c
index f96d260a4a19..e8c1485b9c73 100644
--- a/drivers/gpio/gpio-tb10x.c
+++ b/drivers/gpio/gpio-tb10x.c
@@ -215,7 +215,7 @@ static int tb10x_gpio_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int tb10x_gpio_remove(struct platform_device *pdev)
+static void tb10x_gpio_remove(struct platform_device *pdev)
 {
 	struct tb10x_gpio *tb10x_gpio = platform_get_drvdata(pdev);
 
@@ -225,8 +225,6 @@ static int tb10x_gpio_remove(struct platform_device *pdev)
 		kfree(tb10x_gpio->domain->gc);
 		irq_domain_remove(tb10x_gpio->domain);
 	}
-
-	return 0;
 }
 
 static const struct of_device_id tb10x_gpio_dt_ids[] = {
@@ -237,7 +235,7 @@ MODULE_DEVICE_TABLE(of, tb10x_gpio_dt_ids);
 
 static struct platform_driver tb10x_gpio_driver = {
 	.probe		= tb10x_gpio_probe,
-	.remove		= tb10x_gpio_remove,
+	.remove_new	= tb10x_gpio_remove,
 	.driver = {
 		.name	= "tb10x-gpio",
 		.of_match_table = tb10x_gpio_dt_ids,
-- 
2.40.1