linux-kernel - [PATCH 07/11] nvmem: lpc18xx_eeprom: Convert to platform remove callback returning void

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Date: Tue, 30 Apr 2024 09:49:17 +0100
From: srinivas.kandagatla@...aro.org
To: gregkh@...uxfoundation.org
Cc: linux-kernel@...r.kernel.org,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Vladimir Zapolskiy <vz@...ia.com>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 07/11] nvmem: lpc18xx_eeprom: Convert to platform remove callback returning void

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

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>
Acked-by: Vladimir Zapolskiy <vz@...ia.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/nvmem/lpc18xx_eeprom.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/nvmem/lpc18xx_eeprom.c b/drivers/nvmem/lpc18xx_eeprom.c
index a0275b29afd5..a73acc7377d2 100644
--- a/drivers/nvmem/lpc18xx_eeprom.c
+++ b/drivers/nvmem/lpc18xx_eeprom.c
@@ -249,13 +249,11 @@ static int lpc18xx_eeprom_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int lpc18xx_eeprom_remove(struct platform_device *pdev)
+static void lpc18xx_eeprom_remove(struct platform_device *pdev)
 {
 	struct lpc18xx_eeprom_dev *eeprom = platform_get_drvdata(pdev);
 
 	clk_disable_unprepare(eeprom->clk);
-
-	return 0;
 }
 
 static const struct of_device_id lpc18xx_eeprom_of_match[] = {
@@ -266,7 +264,7 @@ MODULE_DEVICE_TABLE(of, lpc18xx_eeprom_of_match);
 
 static struct platform_driver lpc18xx_eeprom_driver = {
 	.probe = lpc18xx_eeprom_probe,
-	.remove = lpc18xx_eeprom_remove,
+	.remove_new = lpc18xx_eeprom_remove,
 	.driver = {
 		.name = "lpc18xx-eeprom",
 		.of_match_table = lpc18xx_eeprom_of_match,
-- 
2.25.1