netdev - [PATCH net-next 09/54] net: ethernet: arc: Convert to platform remove callback returning void

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Message-Id: <20230918204227.1316886-10-u.kleine-koenig@pengutronix.de>
Date: Mon, 18 Sep 2023 22:41:41 +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: Heiko Stuebner <heiko@...ech.de>,
	Simon Horman <horms@...nel.org>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org
Subject: [PATCH net-next 09/54] net: ethernet: arc: 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 these drivers 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/arc/emac_arc.c      | 6 ++----
 drivers/net/ethernet/arc/emac_rockchip.c | 5 ++---
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/arc/emac_arc.c b/drivers/net/ethernet/arc/emac_arc.c
index ce3147e886a1..a3afddb23ee8 100644
--- a/drivers/net/ethernet/arc/emac_arc.c
+++ b/drivers/net/ethernet/arc/emac_arc.c
@@ -58,14 +58,12 @@ static int emac_arc_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int emac_arc_remove(struct platform_device *pdev)
+static void emac_arc_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 
 	arc_emac_remove(ndev);
 	free_netdev(ndev);
-
-	return 0;
 }
 
 static const struct of_device_id emac_arc_dt_ids[] = {
@@ -76,7 +74,7 @@ MODULE_DEVICE_TABLE(of, emac_arc_dt_ids);
 
 static struct platform_driver emac_arc_driver = {
 	.probe = emac_arc_probe,
-	.remove = emac_arc_remove,
+	.remove_new = emac_arc_remove,
 	.driver = {
 		.name = DRV_NAME,
 		.of_match_table  = emac_arc_dt_ids,
diff --git a/drivers/net/ethernet/arc/emac_rockchip.c b/drivers/net/ethernet/arc/emac_rockchip.c
index 509101112279..493d6356c8ca 100644
--- a/drivers/net/ethernet/arc/emac_rockchip.c
+++ b/drivers/net/ethernet/arc/emac_rockchip.c
@@ -244,7 +244,7 @@ static int emac_rockchip_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int emac_rockchip_remove(struct platform_device *pdev)
+static void emac_rockchip_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct rockchip_priv_data *priv = netdev_priv(ndev);
@@ -260,12 +260,11 @@ static int emac_rockchip_remove(struct platform_device *pdev)
 		clk_disable_unprepare(priv->macclk);
 
 	free_netdev(ndev);
-	return 0;
 }
 
 static struct platform_driver emac_rockchip_driver = {
 	.probe = emac_rockchip_probe,
-	.remove = emac_rockchip_remove,
+	.remove_new = emac_rockchip_remove,
 	.driver = {
 		.name = DRV_NAME,
 		.of_match_table  = emac_rockchip_dt_ids,
-- 
2.40.1