linux-kernel - [PATCH 02/11] firmware: arm_scpi: Convert to platform remove callback returning void

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Message-ID:  <e7b4bc389949c3613a358bd8e57d70d7acd5552b.1703693980.git.u.kleine-koenig@pengutronix.de>
Date: Wed, 27 Dec 2023 17:26:26 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Sudeep Holla <sudeep.holla@....com>
Cc: kernel@...gutronix.de,
	Cristian Marussi <cristian.marussi@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 02/11] firmware: arm_scpi: 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/arm_scpi.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c
index 3f123f592cb4..94a6b4e667de 100644
--- a/drivers/firmware/arm_scpi.c
+++ b/drivers/firmware/arm_scpi.c
@@ -863,7 +863,7 @@ static void scpi_free_channels(void *data)
 		mbox_free_channel(info->channels[i].chan);
 }

-static int scpi_remove(struct platform_device *pdev)
+static void scpi_remove(struct platform_device *pdev)
 {
 	int i;
 	struct scpi_drvinfo *info = platform_get_drvdata(pdev);
@@ -874,8 +874,6 @@ static int scpi_remove(struct platform_device *pdev)
 		kfree(info->dvfs[i]->opps);
 		kfree(info->dvfs[i]);
 	}
-
-	return 0;
 }

 #define MAX_SCPI_XFERS		10
@@ -1048,7 +1046,7 @@ static struct platform_driver scpi_driver = {
 		.dev_groups = versions_groups,
 	},
 	.probe = scpi_probe,
-	.remove = scpi_remove,
+	.remove_new = scpi_remove,
 };
 module_platform_driver(scpi_driver);

-- 
2.43.0