netdev - [PATCH 5/7] net: ethernet: ti: cpsw: Convert to platform remove callback returning void

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Message-ID: <20231117091655.872426-6-u.kleine-koenig@pengutronix.de>
Date: Fri, 17 Nov 2023 10:17:01 +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>,
	Kumar Kartikeya Dwivedi <memxor@...il.com>,
	Stanislav Fomichev <sdf@...gle.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Rob Herring <robh@...nel.org>,
	Marek Majtyka <alardam@...il.com>,
	Yunsheng Lin <linyunsheng@...wei.com>,
	linux-omap@...r.kernel.org,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH 5/7] net: ethernet: ti: 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/cpsw.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index db5a2ba8a6d4..ed29a76420f8 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -1722,7 +1722,7 @@ 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 i, ret;
@@ -1748,7 +1748,6 @@ static int cpsw_remove(struct platform_device *pdev)
 	cpsw_remove_dt(pdev);
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -1803,7 +1802,7 @@ 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