linux-kernel - [PATCH net-next 07/19] net: mdio: ipq8064: Convert to platform remove callback returning void

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230918195102.1302746-8-u.kleine-koenig@pengutronix.de>
Date:   Mon, 18 Sep 2023 21:50:50 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 07/19] net: mdio: ipq8064: 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() is 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/mdio/mdio-ipq8064.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/mdio/mdio-ipq8064.c b/drivers/net/mdio/mdio-ipq8064.c
index fd9716960106..f71b6e1c66e4 100644
--- a/drivers/net/mdio/mdio-ipq8064.c
+++ b/drivers/net/mdio/mdio-ipq8064.c
@@ -147,14 +147,11 @@ ipq8064_mdio_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int
-ipq8064_mdio_remove(struct platform_device *pdev)
+static void ipq8064_mdio_remove(struct platform_device *pdev)
 {
 	struct mii_bus *bus = platform_get_drvdata(pdev);
 
 	mdiobus_unregister(bus);
-
-	return 0;
 }
 
 static const struct of_device_id ipq8064_mdio_dt_ids[] = {
@@ -165,7 +162,7 @@ MODULE_DEVICE_TABLE(of, ipq8064_mdio_dt_ids);
 
 static struct platform_driver ipq8064_mdio_driver = {
 	.probe = ipq8064_mdio_probe,
-	.remove = ipq8064_mdio_remove,
+	.remove_new = ipq8064_mdio_remove,
 	.driver = {
 		.name = "ipq8064-mdio",
 		.of_match_table = ipq8064_mdio_dt_ids,
-- 
2.40.1