netdev - [PATCH net-next 19/19] net: mdio: xgene: Convert to platform remove callback returning void

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Date: Mon, 18 Sep 2023 21:51:02 +0200
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Iyappan Subramanian <iyappan@...amperecomputing.com>,
	Keyur Chudgar <keyur@...amperecomputing.com>,
	Quan Nguyen <quan@...amperecomputing.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next 19/19] net: mdio: xgene: 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/mdio/mdio-xgene.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mdio/mdio-xgene.c b/drivers/net/mdio/mdio-xgene.c
index 1190a793555a..7909d7caf45c 100644
--- a/drivers/net/mdio/mdio-xgene.c
+++ b/drivers/net/mdio/mdio-xgene.c
@@ -432,7 +432,7 @@ static int xgene_mdio_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int xgene_mdio_remove(struct platform_device *pdev)
+static void xgene_mdio_remove(struct platform_device *pdev)
 {
 	struct xgene_mdio_pdata *pdata = platform_get_drvdata(pdev);
 	struct mii_bus *mdio_bus = pdata->mdio_bus;
@@ -443,8 +443,6 @@ static int xgene_mdio_remove(struct platform_device *pdev)
 
 	if (dev->of_node)
 		clk_disable_unprepare(pdata->clk);
-
-	return 0;
 }
 
 static struct platform_driver xgene_mdio_driver = {
@@ -454,7 +452,7 @@ static struct platform_driver xgene_mdio_driver = {
 		.acpi_match_table = ACPI_PTR(xgene_mdio_acpi_match),
 	},
 	.probe = xgene_mdio_probe,
-	.remove = xgene_mdio_remove,
+	.remove_new = xgene_mdio_remove,
 };
 
 module_platform_driver(xgene_mdio_driver);
-- 
2.40.1