linux-kernel - [PATCH 5/8] regulator: uniphier: Convert to platform remove callback returning void

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Message-ID:  <ced2a73a1aeca3f33d4b194e4dbe2672ad84a50a.1701778038.git.u.kleine-koenig@pengutronix.de>
Date:   Tue,  5 Dec 2023 13:26:20 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kernel@...gutronix.de
Subject: [PATCH 5/8] regulator: uniphier: 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/regulator/uniphier-regulator.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/uniphier-regulator.c b/drivers/regulator/uniphier-regulator.c
index 1d8304b88bd6..5f868042392f 100644
--- a/drivers/regulator/uniphier-regulator.c
+++ b/drivers/regulator/uniphier-regulator.c
@@ -115,7 +115,7 @@ static int uniphier_regulator_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int uniphier_regulator_remove(struct platform_device *pdev)
+static void uniphier_regulator_remove(struct platform_device *pdev)
 {
 	struct uniphier_regulator_priv *priv = platform_get_drvdata(pdev);
 	int i;
@@ -124,8 +124,6 @@ static int uniphier_regulator_remove(struct platform_device *pdev)
 		reset_control_assert(priv->rst[i]);
 
 	clk_bulk_disable_unprepare(priv->data->nclks, priv->clk);
-
-	return 0;
 }
 
 /* USB3 controller data */
@@ -209,7 +207,7 @@ MODULE_DEVICE_TABLE(of, uniphier_regulator_match);
 
 static struct platform_driver uniphier_regulator_driver = {
 	.probe = uniphier_regulator_probe,
-	.remove = uniphier_regulator_remove,
+	.remove_new = uniphier_regulator_remove,
 	.driver = {
 		.name  = "uniphier-regulator",
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
-- 
2.42.0