linux-kernel - [PATCH 22/27] platform/x86: sel3350-platform: 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: <20230927081040.2198742-23-u.kleine-koenig@pengutronix.de>
Date:   Wed, 27 Sep 2023 10:10:35 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Hans de Goede <hdegoede@...hat.com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Mark Gross <markgross@...nel.org>
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 22/27] platform/x86: sel3350-platform: 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/platform/x86/sel3350-platform.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/sel3350-platform.c b/drivers/platform/x86/sel3350-platform.c
index fa267d0d3778..d09e976e7148 100644
--- a/drivers/platform/x86/sel3350-platform.c
+++ b/drivers/platform/x86/sel3350-platform.c
@@ -218,15 +218,13 @@ static int sel3350_probe(struct platform_device *pdev)
 	return rs;
 }
 
-static int sel3350_remove(struct platform_device *pdev)
+static void sel3350_remove(struct platform_device *pdev)
 {
 	struct sel3350_data *sel3350 = platform_get_drvdata(pdev);
 
 	platform_device_unregister(sel3350->leds_pdev);
 	gpiod_remove_lookup_table(&sel3350_gpios_table);
 	gpiod_remove_lookup_table(&sel3350_leds_table);
-
-	return 0;
 }
 
 static const struct acpi_device_id sel3350_device_ids[] = {
@@ -237,7 +235,7 @@ MODULE_DEVICE_TABLE(acpi, sel3350_device_ids);
 
 static struct platform_driver sel3350_platform_driver = {
 	.probe = sel3350_probe,
-	.remove = sel3350_remove,
+	.remove_new = sel3350_remove,
 	.driver = {
 		.name = "sel3350-platform",
 		.acpi_match_table = sel3350_device_ids,
-- 
2.40.1