From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Suraj Jitindar Singh <sjitindarsingh@gmail.com>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
Nicholas Piggin <npiggin@gmail.com>,
kernel@pengutronix.de,
"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] powerpc/powernv: Convert to platform remove callback returning void
Date: Wed, 10 Apr 2024 14:47:07 +0200 [thread overview]
Message-ID: <20240410124707.194228-2-u.kleine-koenig@pengutronix.de> (raw)
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@pengutronix.de>
---
drivers/char/powernv-op-panel.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/char/powernv-op-panel.c b/drivers/char/powernv-op-panel.c
index 3c99696b145e..f2cff1a6fed5 100644
--- a/drivers/char/powernv-op-panel.c
+++ b/drivers/char/powernv-op-panel.c
@@ -195,12 +195,11 @@ static int oppanel_probe(struct platform_device *pdev)
return rc;
}
-static int oppanel_remove(struct platform_device *pdev)
+static void oppanel_remove(struct platform_device *pdev)
{
misc_deregister(&oppanel_dev);
kfree(oppanel_lines);
kfree(oppanel_data);
- return 0;
}
static const struct of_device_id oppanel_match[] = {
@@ -214,7 +213,7 @@ static struct platform_driver oppanel_driver = {
.of_match_table = oppanel_match,
},
.probe = oppanel_probe,
- .remove = oppanel_remove,
+ .remove_new = oppanel_remove,
};
module_platform_driver(oppanel_driver);
base-commit: 6ebf211bb11dfc004a2ff73a9de5386fa309c430
--
2.43.0
reply other threads:[~2024-04-10 12:48 UTC|newest]
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