netdev - [PATCH 4/7] net: ethernet: ti: am65-cpsw: Convert to platform remove callback returning void

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Date: Fri, 17 Nov 2023 10:17:00 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: 
Cc: Siddharth Vadapalli <s-vadapalli@...com>,
	Roger Quadros <rogerq@...nel.org>,
	Dan Carpenter <dan.carpenter@...aro.org>,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH 4/7] net: ethernet: ti: am65-cpsw: 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() will be 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/ti/am65-cpsw-nuss.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 960cb3fa0754..83730b566dff 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -2999,7 +2999,7 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int am65_cpsw_nuss_remove(struct platform_device *pdev)
+static void am65_cpsw_nuss_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct am65_cpsw_common *common;
@@ -3030,7 +3030,6 @@ static int am65_cpsw_nuss_remove(struct platform_device *pdev)
 
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-	return 0;
 }
 
 static int am65_cpsw_nuss_suspend(struct device *dev)
@@ -3130,7 +3129,7 @@ static struct platform_driver am65_cpsw_nuss_driver = {
 		.pm = &am65_cpsw_nuss_dev_pm_ops,
 	},
 	.probe = am65_cpsw_nuss_probe,
-	.remove = am65_cpsw_nuss_remove,
+	.remove_new = am65_cpsw_nuss_remove,
 };
 
 module_platform_driver(am65_cpsw_nuss_driver);
-- 
2.42.0