linux-kernel - [PATCH 32/40] soc/tegra: cbb: tegra194-cbb: Convert to platform remove callback returning void

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Message-Id: <20230925095532.1984344-33-u.kleine-koenig@pengutronix.de>
Date:   Mon, 25 Sep 2023 11:55:23 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Sumit Gupta <sumitg@...dia.com>,
        Shang XiaoJing <shangxiaojing@...wei.com>,
        Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Rob Herring <robh@...nel.org>
Cc:     Nick Alcock <nick.alcock@...cle.com>,
        Yang Yingliang <yangyingliang@...wei.com>,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 32/40] soc/tegra: cbb: tegra194-cbb: 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/soc/tegra/cbb/tegra194-cbb.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/tegra/cbb/tegra194-cbb.c b/drivers/soc/tegra/cbb/tegra194-cbb.c
index cf6886f362d3..9cbc562ae7d3 100644
--- a/drivers/soc/tegra/cbb/tegra194-cbb.c
+++ b/drivers/soc/tegra/cbb/tegra194-cbb.c
@@ -2293,7 +2293,7 @@ static int tegra194_cbb_probe(struct platform_device *pdev)
 	return tegra_cbb_register(&cbb->base);
 }
 
-static int tegra194_cbb_remove(struct platform_device *pdev)
+static void tegra194_cbb_remove(struct platform_device *pdev)
 {
 	struct tegra194_cbb *cbb = platform_get_drvdata(pdev);
 	struct tegra_cbb *noc, *tmp;
@@ -2311,8 +2311,6 @@ static int tegra194_cbb_remove(struct platform_device *pdev)
 	}
 
 	spin_unlock_irqrestore(&cbb_lock, flags);
-
-	return 0;
 }
 
 static int __maybe_unused tegra194_cbb_resume_noirq(struct device *dev)
@@ -2332,7 +2330,7 @@ static const struct dev_pm_ops tegra194_cbb_pm = {
 
 static struct platform_driver tegra194_cbb_driver = {
 	.probe = tegra194_cbb_probe,
-	.remove = tegra194_cbb_remove,
+	.remove_new = tegra194_cbb_remove,
 	.driver = {
 		.name = "tegra194-cbb",
 		.of_match_table = of_match_ptr(tegra194_cbb_match),
-- 
2.40.1