netdev - [PATCH net-next 31/54] net: ethernet: mellanox: Convert to platform remove callback returning void

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Message-Id: <20230918204227.1316886-32-u.kleine-koenig@pengutronix.de>
Date: Mon, 18 Sep 2023 22:42:03 +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: Asmaa Mnebhi <asmaa@...dia.com>,
	David Thompson <davthompson@...dia.com>,
	Andrew Lunn <andrew@...n.ch>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH net-next 31/54] net: ethernet: mellanox: 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/mellanox/mlxbf_gige/mlxbf_gige_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
index 694de9513b9f..954ba0826c61 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
@@ -471,7 +471,7 @@ static int mlxbf_gige_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int mlxbf_gige_remove(struct platform_device *pdev)
+static void mlxbf_gige_remove(struct platform_device *pdev)
 {
 	struct mlxbf_gige *priv = platform_get_drvdata(pdev);
 
@@ -479,8 +479,6 @@ static int mlxbf_gige_remove(struct platform_device *pdev)
 	phy_disconnect(priv->netdev->phydev);
 	mlxbf_gige_mdio_remove(priv);
 	platform_set_drvdata(pdev, NULL);
-
-	return 0;
 }
 
 static void mlxbf_gige_shutdown(struct platform_device *pdev)
@@ -499,7 +497,7 @@ MODULE_DEVICE_TABLE(acpi, mlxbf_gige_acpi_match);
 
 static struct platform_driver mlxbf_gige_driver = {
 	.probe = mlxbf_gige_probe,
-	.remove = mlxbf_gige_remove,
+	.remove_new = mlxbf_gige_remove,
 	.shutdown = mlxbf_gige_shutdown,
 	.driver = {
 		.name = KBUILD_MODNAME,
-- 
2.40.1