linux-kernel - [PATCH 11/20] pinctrl: rockchip: Convert to platform remove callback returning void

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Message-Id: <20231009083856.222030-12-u.kleine-koenig@pengutronix.de>
Date:   Mon,  9 Oct 2023 10:38:47 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Heiko Stuebner <heiko@...ech.de>, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 11/20] pinctrl: rockchip: 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/pinctrl-rockchip.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 45e416f68e74..3bedf36a0019 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -3429,7 +3429,7 @@ static int rockchip_pinctrl_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int rockchip_pinctrl_remove(struct platform_device *pdev)
+static void rockchip_pinctrl_remove(struct platform_device *pdev)
 {
 	struct rockchip_pinctrl *info = platform_get_drvdata(pdev);
 	struct rockchip_pin_bank *bank;
@@ -3450,8 +3450,6 @@ static int rockchip_pinctrl_remove(struct platform_device *pdev)
 		}
 		mutex_unlock(&bank->deferred_lock);
 	}
-
-	return 0;
 }
 
 static struct rockchip_pin_bank px30_pin_banks[] = {
@@ -3982,7 +3980,7 @@ static const struct of_device_id rockchip_pinctrl_dt_match[] = {
 
 static struct platform_driver rockchip_pinctrl_driver = {
 	.probe		= rockchip_pinctrl_probe,
-	.remove		= rockchip_pinctrl_remove,
+	.remove_new	= rockchip_pinctrl_remove,
 	.driver = {
 		.name	= "rockchip-pinctrl",
 		.pm = &rockchip_pinctrl_dev_pm_ops,
-- 
2.40.1