netdev - [PATCH net-next 39/54] net: ethernet: nxp: Convert to platform remove callback returning void

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Message-Id: <20230918204227.1316886-40-u.kleine-koenig@pengutronix.de>
Date: Mon, 18 Sep 2023 22:42:11 +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: Vladimir Zapolskiy <vz@...ia.com>,
	linux-arm-kernel@...ts.infradead.org,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH net-next 39/54] net: ethernet: nxp: 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/nxp/lpc_eth.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 1a4a272f4c5c..dd3e58a1319c 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -1417,7 +1417,7 @@ static int lpc_eth_drv_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int lpc_eth_drv_remove(struct platform_device *pdev)
+static void lpc_eth_drv_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct netdata_local *pldat = netdev_priv(ndev);
@@ -1436,8 +1436,6 @@ static int lpc_eth_drv_remove(struct platform_device *pdev)
 	clk_disable_unprepare(pldat->clk);
 	clk_put(pldat->clk);
 	free_netdev(ndev);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM
@@ -1505,7 +1503,7 @@ MODULE_DEVICE_TABLE(of, lpc_eth_match);
 
 static struct platform_driver lpc_eth_driver = {
 	.probe		= lpc_eth_drv_probe,
-	.remove		= lpc_eth_drv_remove,
+	.remove_new	= lpc_eth_drv_remove,
 #ifdef CONFIG_PM
 	.suspend	= lpc_eth_drv_suspend,
 	.resume		= lpc_eth_drv_resume,
-- 
2.40.1