netdev - [PATCH net-next 48/54] net: ethernet: sunplus: Convert to platform remove callback returning void

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Date: Mon, 18 Sep 2023 22:42:20 +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: Wells Lu <wellslutw@...il.com>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH net-next 48/54] net: ethernet: sunplus: 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/sunplus/spl2sw_driver.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/sunplus/spl2sw_driver.c b/drivers/net/ethernet/sunplus/spl2sw_driver.c
index c499a14314f1..391a1bc7f446 100644
--- a/drivers/net/ethernet/sunplus/spl2sw_driver.c
+++ b/drivers/net/ethernet/sunplus/spl2sw_driver.c
@@ -511,7 +511,7 @@ static int spl2sw_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int spl2sw_remove(struct platform_device *pdev)
+static void spl2sw_remove(struct platform_device *pdev)
 {
 	struct spl2sw_common *comm;
 	int i;
@@ -538,8 +538,6 @@ static int spl2sw_remove(struct platform_device *pdev)
 	spl2sw_mdio_remove(comm);
 
 	clk_disable_unprepare(comm->clk);
-
-	return 0;
 }
 
 static const struct of_device_id spl2sw_of_match[] = {
@@ -551,7 +549,7 @@ MODULE_DEVICE_TABLE(of, spl2sw_of_match);
 
 static struct platform_driver spl2sw_driver = {
 	.probe = spl2sw_probe,
-	.remove = spl2sw_remove,
+	.remove_new = spl2sw_remove,
 	.driver = {
 		.name = "sp7021_emac",
 		.of_match_table = spl2sw_of_match,
-- 
2.40.1