linux-kernel - [PATCH 06/20] pinctrl: intel: lynxpoint: Convert to platform remove callback returning void

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Message-Id: <20231009083856.222030-7-u.kleine-koenig@pengutronix.de>
Date:   Mon,  9 Oct 2023 10:38:42 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andy@...nel.org>, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 06/20] pinctrl: intel: lynxpoint: 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/pinctrl/intel/pinctrl-lynxpoint.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/pinctrl/intel/pinctrl-lynxpoint.c b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
index c3732a9f0658..f0725edcab3b 100644
--- a/drivers/pinctrl/intel/pinctrl-lynxpoint.c
+++ b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
@@ -846,10 +846,9 @@ static int lp_gpio_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int lp_gpio_remove(struct platform_device *pdev)
+static void lp_gpio_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
-	return 0;
 }
 
 static int lp_gpio_runtime_suspend(struct device *dev)
@@ -890,7 +889,7 @@ MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match);
 
 static struct platform_driver lp_gpio_driver = {
 	.probe          = lp_gpio_probe,
-	.remove         = lp_gpio_remove,
+	.remove_new     = lp_gpio_remove,
 	.driver         = {
 		.name   = "lp_gpio",
 		.pm	= pm_ptr(&lp_gpio_pm_ops),
-- 
2.40.1