linux-kernel - [PATCH 09/40] soc/hisilicon: kunpeng_hccs: Convert to platform remove callback returning void

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Date:   Mon, 25 Sep 2023 11:55:00 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Huisong Li <lihuisong@...wei.com>
Cc:     linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: [PATCH 09/40] soc/hisilicon: kunpeng_hccs: 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/soc/hisilicon/kunpeng_hccs.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/hisilicon/kunpeng_hccs.c b/drivers/soc/hisilicon/kunpeng_hccs.c
index f3810d9d1caa..01aec0df98ec 100644
--- a/drivers/soc/hisilicon/kunpeng_hccs.c
+++ b/drivers/soc/hisilicon/kunpeng_hccs.c
@@ -1244,14 +1244,12 @@ static int hccs_probe(struct platform_device *pdev)
 	return rc;
 }

-static int hccs_remove(struct platform_device *pdev)
+static void hccs_remove(struct platform_device *pdev)
 {
 	struct hccs_dev *hdev = platform_get_drvdata(pdev);

 	hccs_remove_topo_dirs(hdev);
 	hccs_unregister_pcc_channel(hdev);
-
-	return 0;
 }

 static const struct acpi_device_id hccs_acpi_match[] = {
@@ -1262,7 +1260,7 @@ MODULE_DEVICE_TABLE(acpi, hccs_acpi_match);

 static struct platform_driver hccs_driver = {
 	.probe = hccs_probe,
-	.remove = hccs_remove,
+	.remove_new = hccs_remove,
 	.driver = {
 		.name = "kunpeng_hccs",
 		.acpi_match_table = hccs_acpi_match,
-- 
2.40.1