netdev - [PATCH 6/7] net: ethernet: ti: cpsw-new: Convert to platform remove callback returning void

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Date: Fri, 17 Nov 2023 10:17:02 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: 
Cc: Siddharth Vadapalli <s-vadapalli@...com>,
	Ravi Gunasekaran <r-gunasekaran@...com>,
	Roger Quadros <rogerq@...nel.org>,
	Alexander Duyck <alexanderduyck@...com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Yunsheng Lin <linyunsheng@...wei.com>,
	Marek Majtyka <alardam@...il.com>,
	Rob Herring <robh@...nel.org>,
	linux-omap@...r.kernel.org,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH 6/7] net: ethernet: ti: cpsw-new: 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/cpsw_new.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw_new.c b/drivers/net/ethernet/ti/cpsw_new.c
index a6ce409f563c..dae8d0203021 100644
--- a/drivers/net/ethernet/ti/cpsw_new.c
+++ b/drivers/net/ethernet/ti/cpsw_new.c
@@ -2037,7 +2037,7 @@ static int cpsw_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int cpsw_remove(struct platform_device *pdev)
+static void cpsw_remove(struct platform_device *pdev)
 {
 	struct cpsw_common *cpsw = platform_get_drvdata(pdev);
 	int ret;
@@ -2063,7 +2063,6 @@ static int cpsw_remove(struct platform_device *pdev)
 	cpsw_remove_dt(cpsw);
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-	return 0;
 }
 
 static int __maybe_unused cpsw_suspend(struct device *dev)
@@ -2124,7 +2123,7 @@ static struct platform_driver cpsw_driver = {
 		.of_match_table = cpsw_of_mtable,
 	},
 	.probe = cpsw_probe,
-	.remove = cpsw_remove,
+	.remove_new = cpsw_remove,
 };
 
 module_platform_driver(cpsw_driver);
-- 
2.42.0