linux-kernel - [tip: x86/platform] x86/platform/olpc-x01-pm: Convert to platform remove callback returning void

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Date: Wed, 10 Apr 2024 13:09:05 -0000
From:
 tip-bot2 for Uwe Kleine-König <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: u.kleine-koenig@...gutronix.de, Ingo Molnar <mingo@...nel.org>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/platform] x86/platform/olpc-x01-pm: Convert to platform
 remove callback returning void

The following commit has been merged into the x86/platform branch of tip:

Commit-ID:     c741ccfdc0b3447a40a1c81447e22ae2c2fec54d
Gitweb:        https://git.kernel.org/tip/c741ccfdc0b3447a40a1c81447e22ae2c2fec54d
Author:        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
AuthorDate:    Wed, 10 Apr 2024 09:16:52 +02:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Wed, 10 Apr 2024 14:59:31 +02:00

x86/platform/olpc-x01-pm: 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>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/c7d669d8b0c994c77fb4c3bc7bec78aeb8659c74.1712732665.git.u.kleine-koenig@pengutronix.de
---
 arch/x86/platform/olpc/olpc-xo1-pm.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/platform/olpc/olpc-xo1-pm.c b/arch/x86/platform/olpc/olpc-xo1-pm.c
index f067ac7..6a9c42d 100644
--- a/arch/x86/platform/olpc/olpc-xo1-pm.c
+++ b/arch/x86/platform/olpc/olpc-xo1-pm.c
@@ -144,7 +144,7 @@ static int xo1_pm_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int xo1_pm_remove(struct platform_device *pdev)
+static void xo1_pm_remove(struct platform_device *pdev)
 {
 	if (strcmp(pdev->name, "cs5535-pms") == 0)
 		pms_base = 0;
@@ -152,7 +152,6 @@ static int xo1_pm_remove(struct platform_device *pdev)
 		acpi_base = 0;
 
 	pm_power_off = NULL;
-	return 0;
 }
 
 static struct platform_driver cs5535_pms_driver = {
@@ -160,7 +159,7 @@ static struct platform_driver cs5535_pms_driver = {
 		.name = "cs5535-pms",
 	},
 	.probe = xo1_pm_probe,
-	.remove = xo1_pm_remove,
+	.remove_new = xo1_pm_remove,
 };
 
 static struct platform_driver cs5535_acpi_driver = {
@@ -168,7 +167,7 @@ static struct platform_driver cs5535_acpi_driver = {
 		.name = "olpc-xo1-pm-acpi",
 	},
 	.probe = xo1_pm_probe,
-	.remove = xo1_pm_remove,
+	.remove_new = xo1_pm_remove,
 };
 
 static int __init xo1_pm_init(void)