linux-kernel - [PATCH 27/27] platform/x86/siemens: simatic-ipc-batt-f7188x: Convert to platform remove callback returning void

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Message-Id: <20230927081040.2198742-28-u.kleine-koenig@pengutronix.de>
Date:   Wed, 27 Sep 2023 10:10:40 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Gerd Haeussler <gerd.haeussler.ext@...mens.com>,
        Xing Tong Wu <xingtong.wu@...mens.com>,
        Tobias Schaffner <tobias.schaffner@...mens.com>,
        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 27/27] platform/x86/siemens: simatic-ipc-batt-f7188x: 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/siemens/simatic-ipc-batt-f7188x.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/siemens/simatic-ipc-batt-f7188x.c b/drivers/platform/x86/siemens/simatic-ipc-batt-f7188x.c
index 19c302a68911..5e77e05fdb5d 100644
--- a/drivers/platform/x86/siemens/simatic-ipc-batt-f7188x.c
+++ b/drivers/platform/x86/siemens/simatic-ipc-batt-f7188x.c
@@ -45,11 +45,9 @@ static struct gpiod_lookup_table simatic_ipc_batt_gpio_table_bx_59a = {
 	}
 };
 
-static int simatic_ipc_batt_f7188x_remove(struct platform_device *pdev)
+static void simatic_ipc_batt_f7188x_remove(struct platform_device *pdev)
 {
 	simatic_ipc_batt_remove(pdev, batt_lookup_table);
-
-	return 0;
 }
 
 static int simatic_ipc_batt_f7188x_probe(struct platform_device *pdev)
@@ -75,7 +73,7 @@ static int simatic_ipc_batt_f7188x_probe(struct platform_device *pdev)
 
 static struct platform_driver simatic_ipc_batt_driver = {
 	.probe = simatic_ipc_batt_f7188x_probe,
-	.remove = simatic_ipc_batt_f7188x_remove,
+	.remove_new = simatic_ipc_batt_f7188x_remove,
 	.driver = {
 		.name = KBUILD_MODNAME,
 	},
-- 
2.40.1