linux-kernel - [PATCH 21/27] platform/x86: mlx-platform: Convert to platform remove callback returning void

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Message-Id: <20230927081040.2198742-22-u.kleine-koenig@pengutronix.de>
Date:   Wed, 27 Sep 2023 10:10:34 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Vadim Pasternak <vadimp@...dia.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 21/27] platform/x86: mlx-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/mlx-platform.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index 3d96dbf79a72..03ccadee35d0 100644
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -6606,7 +6606,7 @@ static int mlxplat_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int mlxplat_remove(struct platform_device *pdev)
+static void mlxplat_remove(struct platform_device *pdev)
 {
 	struct mlxplat_priv *priv = platform_get_drvdata(mlxplat_dev);
 
@@ -6617,7 +6617,6 @@ static int mlxplat_remove(struct platform_device *pdev)
 	mlxplat_pre_exit(priv);
 	mlxplat_i2c_main_exit(priv);
 	mlxplat_post_exit();
-	return 0;
 }
 
 static const struct acpi_device_id mlxplat_acpi_table[] = {
@@ -6633,7 +6632,7 @@ static struct platform_driver mlxplat_driver = {
 		.probe_type = PROBE_FORCE_SYNCHRONOUS,
 	},
 	.probe		= mlxplat_probe,
-	.remove		= mlxplat_remove,
+	.remove_new	= mlxplat_remove,
 };
 
 static int __init mlxplat_init(void)
-- 
2.40.1