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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 02/23] gpio: amdpt: Convert to platform remove callback returning void
Date:   Thu, 28 Sep 2023 09:06:45 +0200
Message-Id: <20230928070706.2290137-3-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-amdpt.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-amdpt.c b/drivers/gpio/gpio-amdpt.c
index 07c6d090058d..0a2ea9db4682 100644
--- a/drivers/gpio/gpio-amdpt.c
+++ b/drivers/gpio/gpio-amdpt.c
@@ -122,13 +122,11 @@ static int pt_gpio_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int pt_gpio_remove(struct platform_device *pdev)
+static void pt_gpio_remove(struct platform_device *pdev)
 {
 	struct pt_gpio_chip *pt_gpio = platform_get_drvdata(pdev);
 
 	gpiochip_remove(&pt_gpio->gc);
-
-	return 0;
 }
 
 static const struct acpi_device_id pt_gpio_acpi_match[] = {
@@ -145,7 +143,7 @@ static struct platform_driver pt_gpio_driver = {
 		.acpi_match_table = ACPI_PTR(pt_gpio_acpi_match),
 	},
 	.probe = pt_gpio_probe,
-	.remove = pt_gpio_remove,
+	.remove_new = pt_gpio_remove,
 };
 
 module_platform_driver(pt_gpio_driver);
-- 
2.40.1