linux-kernel - [PATCH 18/40] soc/qcom: icc-bwmon: Convert to platform remove callback returning void

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Message-Id: <20230925095532.1984344-19-u.kleine-koenig@pengutronix.de>
Date:   Mon, 25 Sep 2023 11:55:09 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 18/40] soc/qcom: icc-bwmon: 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/qcom/icc-bwmon.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/qcom/icc-bwmon.c b/drivers/soc/qcom/icc-bwmon.c
index adf2d523f103..656706259353 100644
--- a/drivers/soc/qcom/icc-bwmon.c
+++ b/drivers/soc/qcom/icc-bwmon.c
@@ -793,13 +793,11 @@ static int bwmon_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int bwmon_remove(struct platform_device *pdev)
+static void bwmon_remove(struct platform_device *pdev)
 {
 	struct icc_bwmon *bwmon = platform_get_drvdata(pdev);
 
 	bwmon_disable(bwmon);
-
-	return 0;
 }
 
 static const struct icc_bwmon_data msm8998_bwmon_data = {
@@ -862,7 +860,7 @@ MODULE_DEVICE_TABLE(of, bwmon_of_match);
 
 static struct platform_driver bwmon_driver = {
 	.probe = bwmon_probe,
-	.remove = bwmon_remove,
+	.remove_new = bwmon_remove,
 	.driver = {
 		.name = "qcom-bwmon",
 		.of_match_table = bwmon_of_match,
-- 
2.40.1