linux-kernel - [PATCH 16/40] soc/microchip: mpfs-sys-controller: Convert to platform remove callback returning void

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Message-Id: <20230925095532.1984344-17-u.kleine-koenig@pengutronix.de>
Date:   Mon, 25 Sep 2023 11:55:07 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Conor Dooley <conor.dooley@...rochip.com>,
        Daire McNamara <daire.mcnamara@...rochip.com>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 16/40] soc/microchip: mpfs-sys-controller: 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/soc/microchip/mpfs-sys-controller.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/microchip/mpfs-sys-controller.c b/drivers/soc/microchip/mpfs-sys-controller.c
index fbcd5fd24d7c..0935e9e94172 100644
--- a/drivers/soc/microchip/mpfs-sys-controller.c
+++ b/drivers/soc/microchip/mpfs-sys-controller.c
@@ -149,13 +149,11 @@ static int mpfs_sys_controller_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int mpfs_sys_controller_remove(struct platform_device *pdev)
+static void mpfs_sys_controller_remove(struct platform_device *pdev)
 {
 	struct mpfs_sys_controller *sys_controller = platform_get_drvdata(pdev);
 
 	mpfs_sys_controller_put(sys_controller);
-
-	return 0;
 }
 
 static const struct of_device_id mpfs_sys_controller_of_match[] = {
@@ -207,7 +205,7 @@ static struct platform_driver mpfs_sys_controller_driver = {
 		.of_match_table = mpfs_sys_controller_of_match,
 	},
 	.probe = mpfs_sys_controller_probe,
-	.remove = mpfs_sys_controller_remove,
+	.remove_new = mpfs_sys_controller_remove,
 };
 module_platform_driver(mpfs_sys_controller_driver);
 
-- 
2.40.1