linux-kernel - [PATCH 08/12] bus: tegra-aconnect: Convert to platform remove callback returning void

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Message-ID: <20231109202830.4124591-9-u.kleine-koenig@pengutronix.de>
Date:   Thu,  9 Nov 2023 21:28:38 +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>
Cc:     linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 08/12] bus: tegra-aconnect: 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-aconnect.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/bus/tegra-aconnect.c b/drivers/bus/tegra-aconnect.c
index ac58142301f4..de80008bff92 100644
--- a/drivers/bus/tegra-aconnect.c
+++ b/drivers/bus/tegra-aconnect.c
@@ -53,11 +53,9 @@ static int tegra_aconnect_probe(struct platform_device *pdev)
 	return 0;
 }

-static int tegra_aconnect_remove(struct platform_device *pdev)
+static void tegra_aconnect_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
-
-	return 0;
 }

 static int tegra_aconnect_runtime_resume(struct device *dev)
@@ -106,7 +104,7 @@ MODULE_DEVICE_TABLE(of, tegra_aconnect_of_match);

 static struct platform_driver tegra_aconnect_driver = {
 	.probe = tegra_aconnect_probe,
-	.remove = tegra_aconnect_remove,
+	.remove_new = tegra_aconnect_remove,
 	.driver = {
 		.name = "tegra-aconnect",
 		.of_match_table = tegra_aconnect_of_match,
-- 
2.42.0