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

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Message-ID:  <5df31ef3c069f45634631c9c639bbb60ab1d4798.1703693980.git.u.kleine-koenig@pengutronix.de>
Date: Wed, 27 Dec 2023 17:26:31 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Florian Fainelli <florian.fainelli@...adcom.com>,
	Kieran Bingham <kieran.bingham@...asonboard.com>,
	Arnd Bergmann <arnd@...db.de>,
	Rob Herring <robh@...nel.org>
Cc: kernel@...gutronix.de,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 07/11] firmware: raspberrypi: 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/firmware/raspberrypi.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c
index 4cd290a60fba..322aada20f74 100644
--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -317,7 +317,7 @@ static void rpi_firmware_shutdown(struct platform_device *pdev)
 	rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_REBOOT, NULL, 0);
 }
 
-static int rpi_firmware_remove(struct platform_device *pdev)
+static void rpi_firmware_remove(struct platform_device *pdev)
 {
 	struct rpi_firmware *fw = platform_get_drvdata(pdev);
 
@@ -327,8 +327,6 @@ static int rpi_firmware_remove(struct platform_device *pdev)
 	rpi_clk = NULL;
 
 	rpi_firmware_put(fw);
-
-	return 0;
 }
 
 static const struct of_device_id rpi_firmware_of_match[] = {
@@ -406,7 +404,7 @@ static struct platform_driver rpi_firmware_driver = {
 	},
 	.probe		= rpi_firmware_probe,
 	.shutdown	= rpi_firmware_shutdown,
-	.remove		= rpi_firmware_remove,
+	.remove_new	= rpi_firmware_remove,
 };
 module_platform_driver(rpi_firmware_driver);
 
-- 
2.43.0