linux-kernel - [PATCH net-next 02/19] net: mdio: bcm-iproc: Convert to platform remove callback returning void

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Message-Id: <20230918195102.1302746-3-u.kleine-koenig@pengutronix.de>
Date:   Mon, 18 Sep 2023 21:50:45 +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 02/19] net: mdio: 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-bcm-iproc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mdio/mdio-bcm-iproc.c b/drivers/net/mdio/mdio-bcm-iproc.c
index 77fc970cdfde..5a2d26c6afdc 100644
--- a/drivers/net/mdio/mdio-bcm-iproc.c
+++ b/drivers/net/mdio/mdio-bcm-iproc.c
@@ -168,14 +168,12 @@ static int iproc_mdio_probe(struct platform_device *pdev)
 	return rc;
 }
 
-static int iproc_mdio_remove(struct platform_device *pdev)
+static void iproc_mdio_remove(struct platform_device *pdev)
 {
 	struct iproc_mdio_priv *priv = platform_get_drvdata(pdev);
 
 	mdiobus_unregister(priv->mii_bus);
 	mdiobus_free(priv->mii_bus);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -210,7 +208,7 @@ static struct platform_driver iproc_mdio_driver = {
 #endif
 	},
 	.probe = iproc_mdio_probe,
-	.remove = iproc_mdio_remove,
+	.remove_new = iproc_mdio_remove,
 };
 
 module_platform_driver(iproc_mdio_driver);
-- 
2.40.1