linux-kernel - [PATCH 14/27] platform/mellanox: mlxbf-bootctl: Convert to platform remove callback returning void

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Message-Id: <20230927081040.2198742-15-u.kleine-koenig@pengutronix.de>
Date:   Wed, 27 Sep 2023 10:10:27 +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>,
        Vadim Pasternak <vadimp@...dia.com>
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 14/27] platform/mellanox: mlxbf-bootctl: 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/mellanox/mlxbf-bootctl.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/mellanox/mlxbf-bootctl.c b/drivers/platform/mellanox/mlxbf-bootctl.c
index 4ee7bb431b7c..1ac7dab22c63 100644
--- a/drivers/platform/mellanox/mlxbf-bootctl.c
+++ b/drivers/platform/mellanox/mlxbf-bootctl.c
@@ -1028,17 +1028,15 @@ static int mlxbf_bootctl_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mlxbf_bootctl_remove(struct platform_device *pdev)
+static void mlxbf_bootctl_remove(struct platform_device *pdev)
 {
 	sysfs_remove_bin_file(&pdev->dev.kobj,
 			      &mlxbf_bootctl_bootfifo_sysfs_attr);
-
-	return 0;
 }
 
 static struct platform_driver mlxbf_bootctl_driver = {
 	.probe = mlxbf_bootctl_probe,
-	.remove = mlxbf_bootctl_remove,
+	.remove_new = mlxbf_bootctl_remove,
 	.driver = {
 		.name = "mlxbf-bootctl",
 		.dev_groups = mlxbf_bootctl_groups,
-- 
2.40.1