linux-kernel - [PATCH 04/15] memory: fsl-corenet-cf: Convert to platform remove callback returning void

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Message-ID:  <3b506dcf90b57c341e59bcf5af7ee69092a2d857.1702822744.git.u.kleine-koenig@pengutronix.de>
Date: Sun, 17 Dec 2023 15:29:30 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: kernel@...gutronix.de,
	linux-kernel@...r.kernel.org
Subject: [PATCH 04/15] memory: fsl-corenet-cf: 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/memory/fsl-corenet-cf.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/memory/fsl-corenet-cf.c b/drivers/memory/fsl-corenet-cf.c
index 8096c4f33303..f47d05f7c5c5 100644
--- a/drivers/memory/fsl-corenet-cf.c
+++ b/drivers/memory/fsl-corenet-cf.c
@@ -223,7 +223,7 @@ static int ccf_probe(struct platform_device *pdev)
 	return 0;
 }

-static int ccf_remove(struct platform_device *pdev)
+static void ccf_remove(struct platform_device *pdev)
 {
 	struct ccf_private *ccf = dev_get_drvdata(&pdev->dev);

@@ -241,8 +241,6 @@ static int ccf_remove(struct platform_device *pdev)
 		iowrite32be(0, &ccf->err_regs->errinten);
 		break;
 	}
-
-	return 0;
 }

 static struct platform_driver ccf_driver = {
@@ -251,7 +249,7 @@ static struct platform_driver ccf_driver = {
 		.of_match_table = ccf_matches,
 	},
 	.probe = ccf_probe,
-	.remove = ccf_remove,
+	.remove_new = ccf_remove,
 };

 module_platform_driver(ccf_driver);
-- 
2.42.0