linux-kernel - [PATCH net-next 10/19] net: mdio: mux-bcm-iproc: Convert to platform remove callback returning void

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Message-Id: <20230918195102.1302746-11-u.kleine-koenig@pengutronix.de>
Date:   Mon, 18 Sep 2023 21:50:53 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 10/19] net: mdio: mux-bcm-iproc: 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() is 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/net/mdio/mdio-mux-bcm-iproc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mdio/mdio-mux-bcm-iproc.c b/drivers/net/mdio/mdio-mux-bcm-iproc.c
index 956d54846b62..a750bd4c77a0 100644
--- a/drivers/net/mdio/mdio-mux-bcm-iproc.c
+++ b/drivers/net/mdio/mdio-mux-bcm-iproc.c
@@ -287,15 +287,13 @@ static int mdio_mux_iproc_probe(struct platform_device *pdev)
 	return rc;
 }
 
-static int mdio_mux_iproc_remove(struct platform_device *pdev)
+static void mdio_mux_iproc_remove(struct platform_device *pdev)
 {
 	struct iproc_mdiomux_desc *md = platform_get_drvdata(pdev);
 
 	mdio_mux_uninit(md->mux_handle);
 	mdiobus_unregister(md->mii_bus);
 	clk_disable_unprepare(md->core_clk);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -342,7 +340,7 @@ static struct platform_driver mdiomux_iproc_driver = {
 		.pm		= &mdio_mux_iproc_pm_ops,
 	},
 	.probe		= mdio_mux_iproc_probe,
-	.remove		= mdio_mux_iproc_remove,
+	.remove_new	= mdio_mux_iproc_remove,
 };
 
 module_platform_driver(mdiomux_iproc_driver);
-- 
2.40.1