netdev - [PATCH net-next 18/54] net: ethernet: dnet: Convert to platform remove callback returning void

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Message-Id: <20230918204227.1316886-19-u.kleine-koenig@pengutronix.de>
Date: Mon, 18 Sep 2023 22:41:50 +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: Yang Yingliang <yangyingliang@...wei.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH net-next 18/54] net: ethernet: dnet: 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/dnet.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/dnet.c b/drivers/net/ethernet/dnet.c
index 151ca9573be9..2a18df3605f1 100644
--- a/drivers/net/ethernet/dnet.c
+++ b/drivers/net/ethernet/dnet.c
@@ -841,7 +841,7 @@ static int dnet_probe(struct platform_device *pdev)
 	return err;
 }

-static int dnet_remove(struct platform_device *pdev)
+static void dnet_remove(struct platform_device *pdev)
 {

 	struct net_device *dev;
@@ -859,13 +859,11 @@ static int dnet_remove(struct platform_device *pdev)
 		free_irq(dev->irq, dev);
 		free_netdev(dev);
 	}
-
-	return 0;
 }

 static struct platform_driver dnet_driver = {
 	.probe		= dnet_probe,
-	.remove		= dnet_remove,
+	.remove_new	= dnet_remove,
 	.driver		= {
 		.name		= "dnet",
 	},
-- 
2.40.1