netdev - [PATCH net-next 21/22] can: ti_hecc: Convert to platform remove callback returning void

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Message-Id: <20230515205759.1003118-22-mkl@pengutronix.de>
Date: Mon, 15 May 2023 22:57:58 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 21/22] can: ti_hecc: Convert to platform remove callback returning void

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

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>
Link: https://lore.kernel.org/r/20230512212725.143824-19-u.kleine-koenig@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/ti_hecc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
index 27700f72eac2..9bab0b4cc449 100644
--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -963,7 +963,7 @@ static int ti_hecc_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int ti_hecc_remove(struct platform_device *pdev)
+static void ti_hecc_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct ti_hecc_priv *priv = netdev_priv(ndev);
@@ -973,8 +973,6 @@ static int ti_hecc_remove(struct platform_device *pdev)
 	clk_put(priv->clk);
 	can_rx_offload_del(&priv->offload);
 	free_candev(ndev);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM
@@ -1028,7 +1026,7 @@ static struct platform_driver ti_hecc_driver = {
 		.of_match_table = ti_hecc_dt_ids,
 	},
 	.probe = ti_hecc_probe,
-	.remove = ti_hecc_remove,
+	.remove_new = ti_hecc_remove,
 	.suspend = ti_hecc_suspend,
 	.resume = ti_hecc_resume,
 };
-- 
2.39.2