netdev - [PATCH net-next 05/10] net: sfp: Convert to platform remove callback returning void

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Message-ID: <20231117095922.876489-6-u.kleine-koenig@pengutronix.de>
Date: Fri, 17 Nov 2023 10:59:28 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Russell King <linux@...linux.org.uk>,
	Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH net-next 05/10] net: sfp: 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/phy/sfp.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index 5468bd209fab..859b4749e8e2 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -3096,7 +3096,7 @@ static int sfp_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int sfp_remove(struct platform_device *pdev)
+static void sfp_remove(struct platform_device *pdev)
 {
 	struct sfp *sfp = platform_get_drvdata(pdev);
 
@@ -3106,8 +3106,6 @@ static int sfp_remove(struct platform_device *pdev)
 	rtnl_lock();
 	sfp_sm_event(sfp, SFP_E_REMOVE);
 	rtnl_unlock();
-
-	return 0;
 }
 
 static void sfp_shutdown(struct platform_device *pdev)
@@ -3128,7 +3126,7 @@ static void sfp_shutdown(struct platform_device *pdev)
 
 static struct platform_driver sfp_driver = {
 	.probe = sfp_probe,
-	.remove = sfp_remove,
+	.remove_new = sfp_remove,
 	.shutdown = sfp_shutdown,
 	.driver = {
 		.name = "sfp",
-- 
2.42.0