netdev - [PATCH net-next 50/54] net: ethernet: tundra: Convert to platform remove callback returning void

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Message-Id: <20230918204227.1316886-51-u.kleine-koenig@pengutronix.de>
Date: Mon, 18 Sep 2023 22:42:22 +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: Marc Kleine-Budde <mkl@...gutronix.de>,
	Zhengchao Shao <shaozhengchao@...wei.com>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH net-next 50/54] net: ethernet: tundra: 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/tundra/tsi108_eth.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/tundra/tsi108_eth.c b/drivers/net/ethernet/tundra/tsi108_eth.c
index d09d352e1c0a..554aff7c8f3b 100644
--- a/drivers/net/ethernet/tundra/tsi108_eth.c
+++ b/drivers/net/ethernet/tundra/tsi108_eth.c
@@ -1660,7 +1660,7 @@ static void tsi108_timed_checker(struct timer_list *t)
 	mod_timer(&data->timer, jiffies + CHECK_PHY_INTERVAL);
 }
 
-static int tsi108_ether_remove(struct platform_device *pdev)
+static void tsi108_ether_remove(struct platform_device *pdev)
 {
 	struct net_device *dev = platform_get_drvdata(pdev);
 	struct tsi108_prv_data *priv = netdev_priv(dev);
@@ -1670,15 +1670,13 @@ static int tsi108_ether_remove(struct platform_device *pdev)
 	iounmap(priv->regs);
 	iounmap(priv->phyregs);
 	free_netdev(dev);
-
-	return 0;
 }
 
 /* Structure for a device driver */
 
 static struct platform_driver tsi_eth_driver = {
 	.probe = tsi108_init_one,
-	.remove = tsi108_ether_remove,
+	.remove_new = tsi108_ether_remove,
 	.driver	= {
 		.name = "tsi-ethernet",
 	},
-- 
2.40.1