netdev - [PATCH net-next 07/10] net: wan/ixp4xx_hss: Convert to platform remove callback returning void

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Message-ID: <20231117095922.876489-8-u.kleine-koenig@pengutronix.de>
Date: Fri, 17 Nov 2023 10:59:30 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Linus Walleij <linusw@...nel.org>,
	Imre Kaloz <kaloz@...nwrt.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: linux-arm-kernel@...ts.infradead.org,
	netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH net-next 07/10] net: wan/ixp4xx_hss: 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/wan/ixp4xx_hss.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wan/ixp4xx_hss.c b/drivers/net/wan/ixp4xx_hss.c
index b09f4c235142..931c5ca79ea5 100644
--- a/drivers/net/wan/ixp4xx_hss.c
+++ b/drivers/net/wan/ixp4xx_hss.c
@@ -1522,20 +1522,19 @@ static int ixp4xx_hss_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int ixp4xx_hss_remove(struct platform_device *pdev)
+static void ixp4xx_hss_remove(struct platform_device *pdev)
 {
 	struct port *port = platform_get_drvdata(pdev);
 
 	unregister_hdlc_device(port->netdev);
 	free_netdev(port->netdev);
 	npe_release(port->npe);
-	return 0;
 }
 
 static struct platform_driver ixp4xx_hss_driver = {
 	.driver.name	= DRV_NAME,
 	.probe		= ixp4xx_hss_probe,
-	.remove		= ixp4xx_hss_remove,
+	.remove_new	= ixp4xx_hss_remove,
 };
 module_platform_driver(ixp4xx_hss_driver);
 
-- 
2.42.0