linux-kernel - [PATCH v2 18/18] mfd: twl4030-audio: Convert to platform remove callback returning void

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Message-ID: <20231123165627.492259-19-u.kleine-koenig@pengutronix.de>
Date:   Thu, 23 Nov 2023 17:56:46 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Lee Jones <lee@...nel.org>
Cc:     Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: [PATCH v2 18/18] mfd: twl4030-audio: 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/mfd/twl4030-audio.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/twl4030-audio.c b/drivers/mfd/twl4030-audio.c
index 88002f8941e5..d436ddf661da 100644
--- a/drivers/mfd/twl4030-audio.c
+++ b/drivers/mfd/twl4030-audio.c
@@ -258,12 +258,10 @@ static int twl4030_audio_probe(struct platform_device *pdev)
 	return ret;
 }

-static int twl4030_audio_remove(struct platform_device *pdev)
+static void twl4030_audio_remove(struct platform_device *pdev)
 {
 	mfd_remove_devices(&pdev->dev);
 	twl4030_audio_dev = NULL;
-
-	return 0;
 }

 static const struct of_device_id twl4030_audio_of_match[] = {
@@ -278,7 +276,7 @@ static struct platform_driver twl4030_audio_driver = {
 		.of_match_table = twl4030_audio_of_match,
 	},
 	.probe		= twl4030_audio_probe,
-	.remove		= twl4030_audio_remove,
+	.remove_new	= twl4030_audio_remove,
 };

 module_platform_driver(twl4030_audio_driver);
-- 
2.42.0