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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>,
        Kunihiko Hayashi <hayashi.kunihiko@socionext.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH 19/23] gpio: uniphier: Convert to platform remove callback returning void
Date:   Thu, 28 Sep 2023 09:07:02 +0200
Message-Id: <20230928070706.2290137-20-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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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-uniphier.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-uniphier.c b/drivers/gpio/gpio-uniphier.c
index 9725b7aa18a7..1f440707f8f4 100644
--- a/drivers/gpio/gpio-uniphier.c
+++ b/drivers/gpio/gpio-uniphier.c
@@ -414,13 +414,11 @@ static int uniphier_gpio_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int uniphier_gpio_remove(struct platform_device *pdev)
+static void uniphier_gpio_remove(struct platform_device *pdev)
 {
 	struct uniphier_gpio_priv *priv = platform_get_drvdata(pdev);
 
 	irq_domain_remove(priv->domain);
-
-	return 0;
 }
 
 static int __maybe_unused uniphier_gpio_suspend(struct device *dev)
@@ -482,7 +480,7 @@ MODULE_DEVICE_TABLE(of, uniphier_gpio_match);
 
 static struct platform_driver uniphier_gpio_driver = {
 	.probe = uniphier_gpio_probe,
-	.remove = uniphier_gpio_remove,
+	.remove_new = uniphier_gpio_remove,
 	.driver = {
 		.name = "uniphier-gpio",
 		.of_match_table = uniphier_gpio_match,
-- 
2.40.1