netdev - [PATCH net-next 38/54] net: ethernet: ni: Convert to platform remove callback returning void

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Message-Id: <20230918204227.1316886-39-u.kleine-koenig@pengutronix.de>
Date: Mon, 18 Sep 2023 22:42:10 +0200
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Simon Horman <horms@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	Andrew Lunn <andrew@...n.ch>,
	Rob Herring <robh@...nel.org>,
	Yuri Karpov <YKarpov@...ras.ru>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH net-next 38/54] net: ethernet: ni: 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/ethernet/ni/nixge.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/ni/nixge.c b/drivers/net/ethernet/ni/nixge.c
index ba27bbc68f85..97f4798f4b42 100644
--- a/drivers/net/ethernet/ni/nixge.c
+++ b/drivers/net/ethernet/ni/nixge.c
@@ -1397,7 +1397,7 @@ static int nixge_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int nixge_remove(struct platform_device *pdev)
+static void nixge_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct nixge_priv *priv = netdev_priv(ndev);
@@ -1412,13 +1412,11 @@ static int nixge_remove(struct platform_device *pdev)
 		mdiobus_unregister(priv->mii_bus);
 
 	free_netdev(ndev);
-
-	return 0;
 }
 
 static struct platform_driver nixge_driver = {
 	.probe		= nixge_probe,
-	.remove		= nixge_remove,
+	.remove_new	= nixge_remove,
 	.driver		= {
 		.name		= "nixge",
 		.of_match_table	= nixge_dt_ids,
-- 
2.40.1