netdev - [PATCH 7/7] net: ethernet: ezchip: Convert to platform remove callback returning void

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Message-ID: <20231117091655.872426-8-u.kleine-koenig@pengutronix.de>
Date: Fri, 17 Nov 2023 10:17:03 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: 
Cc: Christian Marangi <ansuelsmth@...il.com>,
	Alex Elder <elder@...aro.org>,
	Rob Herring <robh@...nel.org>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH 7/7] net: ethernet: ezchip: 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() will be 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/ezchip/nps_enet.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/ezchip/nps_enet.c b/drivers/net/ethernet/ezchip/nps_enet.c
index 4d7184d46824..07c2b701b5fa 100644
--- a/drivers/net/ethernet/ezchip/nps_enet.c
+++ b/drivers/net/ethernet/ezchip/nps_enet.c
@@ -633,7 +633,7 @@ static s32 nps_enet_probe(struct platform_device *pdev)
 	return err;
 }
 
-static s32 nps_enet_remove(struct platform_device *pdev)
+static void nps_enet_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct nps_enet_priv *priv = netdev_priv(ndev);
@@ -641,8 +641,6 @@ static s32 nps_enet_remove(struct platform_device *pdev)
 	unregister_netdev(ndev);
 	netif_napi_del(&priv->napi);
 	free_netdev(ndev);
-
-	return 0;
 }
 
 static const struct of_device_id nps_enet_dt_ids[] = {
@@ -653,7 +651,7 @@ MODULE_DEVICE_TABLE(of, nps_enet_dt_ids);
 
 static struct platform_driver nps_enet_driver = {
 	.probe = nps_enet_probe,
-	.remove = nps_enet_remove,
+	.remove_new = nps_enet_remove,
 	.driver = {
 		.name = DRV_NAME,
 		.of_match_table  = nps_enet_dt_ids,
-- 
2.42.0