linux-kernel - [PATCH 23/29] platform/x86: intel: pmc: core: Convert to platform remove callback returning void

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Message-Id: <20230302144732.1903781-24-u.kleine-koenig@pengutronix.de>
Date:   Thu,  2 Mar 2023 15:47:26 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Rajneesh Bhardwaj <irenic.rajneesh@...il.com>,
        David E Box <david.e.box@...el.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>
Cc:     kernel@...gutronix.de,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 23/29] platform/x86: intel: pmc: core: 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 (mostly) ignored
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.

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/platform/x86/intel/pmc/core.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 3a15d32d7644..e489d2175e42 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -1149,7 +1149,7 @@ static int pmc_core_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int pmc_core_remove(struct platform_device *pdev)
+static void pmc_core_remove(struct platform_device *pdev)
 {
 	struct pmc_dev *pmcdev = platform_get_drvdata(pdev);
 
@@ -1157,7 +1157,6 @@ static int pmc_core_remove(struct platform_device *pdev)
 	platform_set_drvdata(pdev, NULL);
 	mutex_destroy(&pmcdev->lock);
 	iounmap(pmcdev->regbase);
-	return 0;
 }
 
 static bool warn_on_s0ix_failures;
@@ -1264,7 +1263,7 @@ static struct platform_driver pmc_core_driver = {
 		.dev_groups = pmc_dev_groups,
 	},
 	.probe = pmc_core_probe,
-	.remove = pmc_core_remove,
+	.remove_new = pmc_core_remove,
 };
 
 module_platform_driver(pmc_core_driver);
-- 
2.39.1