linux-kernel - [PATCH 09/12] bus: tegra-gmi: Convert to platform remove callback returning void

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Message-ID: <20231109202830.4124591-10-u.kleine-koenig@pengutronix.de>
Date:   Thu,  9 Nov 2023 21:28:39 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Arnd Bergmann <arnd@...db.de>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Rob Herring <robh@...nel.org>, Yangtao Li <frank.li@...o.com>
Cc:     linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 09/12] bus: tegra-gmi: 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/tegra-gmi.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/bus/tegra-gmi.c b/drivers/bus/tegra-gmi.c
index 59919e99f7cc..f5d6414df9f2 100644
--- a/drivers/bus/tegra-gmi.c
+++ b/drivers/bus/tegra-gmi.c
@@ -258,14 +258,12 @@ static int tegra_gmi_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int tegra_gmi_remove(struct platform_device *pdev)
+static void tegra_gmi_remove(struct platform_device *pdev)
 {
 	struct tegra_gmi *gmi = platform_get_drvdata(pdev);
 
 	of_platform_depopulate(gmi->dev);
 	tegra_gmi_disable(gmi);
-
-	return 0;
 }
 
 static int __maybe_unused tegra_gmi_runtime_resume(struct device *dev)
@@ -305,7 +303,7 @@ MODULE_DEVICE_TABLE(of, tegra_gmi_id_table);
 
 static struct platform_driver tegra_gmi_driver = {
 	.probe = tegra_gmi_probe,
-	.remove = tegra_gmi_remove,
+	.remove_new = tegra_gmi_remove,
 	.driver = {
 		.name		= "tegra-gmi",
 		.of_match_table	= tegra_gmi_id_table,
-- 
2.42.0