linux-kernel - [PATCH 03/15] memory: emif: Convert to platform remove callback returning void

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Message-ID:  <da2fa8d040d542edc1318aeae5117317bb22aa06.1702822744.git.u.kleine-koenig@pengutronix.de>
Date: Sun, 17 Dec 2023 15:29:29 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: kernel@...gutronix.de,
	Santosh Shilimkar <ssantosh@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 03/15] memory: emif: 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/emif.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c
index f305643209f0..434982545be6 100644
--- a/drivers/memory/emif.c
+++ b/drivers/memory/emif.c
@@ -1159,13 +1159,11 @@ static int __init_or_module emif_probe(struct platform_device *pdev)
 	return -ENODEV;
 }

-static int __exit emif_remove(struct platform_device *pdev)
+static void __exit emif_remove(struct platform_device *pdev)
 {
 	struct emif_data *emif = platform_get_drvdata(pdev);

 	emif_debugfs_exit(emif);
-
-	return 0;
 }

 static void emif_shutdown(struct platform_device *pdev)
@@ -1185,7 +1183,7 @@ MODULE_DEVICE_TABLE(of, emif_of_match);
 #endif

 static struct platform_driver emif_driver = {
-	.remove		= __exit_p(emif_remove),
+	.remove_new	= __exit_p(emif_remove),
 	.shutdown	= emif_shutdown,
 	.driver = {
 		.name = "emif",
-- 
2.42.0