netdev - [PATCH net-next 30/54] net: ethernet: mediatek: Convert to platform remove callback returning void

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Message-Id: <20230918204227.1316886-31-u.kleine-koenig@pengutronix.de>
Date: Mon, 18 Sep 2023 22:42:02 +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: Felix Fietkau <nbd@....name>,
	John Crispin <john@...ozen.org>,
	Sean Wang <sean.wang@...iatek.com>,
	Mark Lee <Mark-MC.Lee@...iatek.com>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH net-next 30/54] net: ethernet: mediatek: 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/mediatek/mtk_eth_soc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 3cffd1bd3067..4ac8d7cd97ae 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -5002,7 +5002,7 @@ static int mtk_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int mtk_remove(struct platform_device *pdev)
+static void mtk_remove(struct platform_device *pdev)
 {
 	struct mtk_eth *eth = platform_get_drvdata(pdev);
 	struct mtk_mac *mac;
@@ -5024,8 +5024,6 @@ static int mtk_remove(struct platform_device *pdev)
 	netif_napi_del(&eth->rx_napi);
 	mtk_cleanup(eth);
 	mtk_mdio_cleanup(eth);
-
-	return 0;
 }
 
 static const struct mtk_soc_data mt2701_data = {
@@ -5226,7 +5224,7 @@ MODULE_DEVICE_TABLE(of, of_mtk_match);
 
 static struct platform_driver mtk_driver = {
 	.probe = mtk_probe,
-	.remove = mtk_remove,
+	.remove_new = mtk_remove,
 	.driver = {
 		.name = "mtk_soc_eth",
 		.of_match_table = of_mtk_match,
-- 
2.40.1