linux-kernel - [PATCH 20/23] gpio: xgene-sb: Convert to platform remove callback returning void

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Message-Id: <20230928070706.2290137-21-u.kleine-koenig@pengutronix.de>
Date:   Thu, 28 Sep 2023 09:07:03 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Andy Shevchenko <andy@...nel.org>, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 20/23] gpio: xgene-sb: 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 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@...gutronix.de>
---
 drivers/gpio/gpio-xgene-sb.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-xgene-sb.c b/drivers/gpio/gpio-xgene-sb.c
index 453bf9338ac4..bd5befa807c3 100644
--- a/drivers/gpio/gpio-xgene-sb.c
+++ b/drivers/gpio/gpio-xgene-sb.c
@@ -295,15 +295,13 @@ static int xgene_gpio_sb_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int xgene_gpio_sb_remove(struct platform_device *pdev)
+static void xgene_gpio_sb_remove(struct platform_device *pdev)
 {
 	struct xgene_gpio_sb *priv = platform_get_drvdata(pdev);
 
 	acpi_gpiochip_free_interrupts(&priv->gc);
 
 	irq_domain_remove(priv->irq_domain);
-
-	return 0;
 }
 
 static const struct of_device_id xgene_gpio_sb_of_match[] = {
@@ -327,7 +325,7 @@ static struct platform_driver xgene_gpio_sb_driver = {
 		   .acpi_match_table = ACPI_PTR(xgene_gpio_sb_acpi_match),
 		   },
 	.probe = xgene_gpio_sb_probe,
-	.remove = xgene_gpio_sb_remove,
+	.remove_new = xgene_gpio_sb_remove,
 };
 module_platform_driver(xgene_gpio_sb_driver);
 
-- 
2.40.1