netdev - [PATCH net-next 27/54] net: ethernet: lantiq_xrx200: Convert to platform remove callback returning void

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Message-Id: <20230918204227.1316886-28-u.kleine-koenig@pengutronix.de>
Date: Mon, 18 Sep 2023 22:41:59 +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: Hauke Mehrtens <hauke@...ke-m.de>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH net-next 27/54] net: ethernet: lantiq_xrx200: 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/lantiq_xrx200.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/lantiq_xrx200.c b/drivers/net/ethernet/lantiq_xrx200.c
index 8d646c7f8c82..8bd4def3622e 100644
--- a/drivers/net/ethernet/lantiq_xrx200.c
+++ b/drivers/net/ethernet/lantiq_xrx200.c
@@ -641,7 +641,7 @@ static int xrx200_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int xrx200_remove(struct platform_device *pdev)
+static void xrx200_remove(struct platform_device *pdev)
 {
 	struct xrx200_priv *priv = platform_get_drvdata(pdev);
 	struct net_device *net_dev = priv->net_dev;
@@ -659,8 +659,6 @@ static int xrx200_remove(struct platform_device *pdev)
 
 	/* shut down hardware */
 	xrx200_hw_cleanup(priv);
-
-	return 0;
 }
 
 static const struct of_device_id xrx200_match[] = {
@@ -671,7 +669,7 @@ MODULE_DEVICE_TABLE(of, xrx200_match);
 
 static struct platform_driver xrx200_driver = {
 	.probe = xrx200_probe,
-	.remove = xrx200_remove,
+	.remove_new = xrx200_remove,
 	.driver = {
 		.name = "lantiq,xrx200-net",
 		.of_match_table = xrx200_match,
-- 
2.40.1