linux-kernel - [PATCH 06/12] bus: sun50i-de2: 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: <20231109202830.4124591-7-u.kleine-koenig@pengutronix.de>
Date:   Thu,  9 Nov 2023 21:28:36 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Arnd Bergmann <arnd@...db.de>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: [PATCH 06/12] bus: sun50i-de2: 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/bus/sun50i-de2.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/bus/sun50i-de2.c b/drivers/bus/sun50i-de2.c
index 414f29cdedf0..3339311ce068 100644
--- a/drivers/bus/sun50i-de2.c
+++ b/drivers/bus/sun50i-de2.c
@@ -24,10 +24,9 @@ static int sun50i_de2_bus_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int sun50i_de2_bus_remove(struct platform_device *pdev)
+static void sun50i_de2_bus_remove(struct platform_device *pdev)
 {
 	sunxi_sram_release(&pdev->dev);
-	return 0;
 }
 
 static const struct of_device_id sun50i_de2_bus_of_match[] = {
@@ -37,7 +36,7 @@ static const struct of_device_id sun50i_de2_bus_of_match[] = {
 
 static struct platform_driver sun50i_de2_bus_driver = {
 	.probe = sun50i_de2_bus_probe,
-	.remove = sun50i_de2_bus_remove,
+	.remove_new = sun50i_de2_bus_remove,
 	.driver = {
 		.name = "sun50i-de2-bus",
 		.of_match_table = sun50i_de2_bus_of_match,
-- 
2.42.0