linux-kernel - [PATCH 11/11] misc: xilinx_tmr_inject: Convert to platform remove callback returning void

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Message-ID:  <198112757eac0fc004677a4757ce48ae7c7194ab.1708508896.git.u.kleine-koenig@pengutronix.de>
Date: Wed, 21 Feb 2024 10:53:55 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: kernel@...gutronix.de,
	Appana Durga Kedareswara rao <appana.durga.kedareswara.rao@....com>,
	Michal Simek <michal.simek@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 11/11] misc: xilinx_tmr_inject: 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/misc/xilinx_tmr_inject.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/xilinx_tmr_inject.c b/drivers/misc/xilinx_tmr_inject.c
index 9fc5835bfebc..73c6da7d0963 100644
--- a/drivers/misc/xilinx_tmr_inject.c
+++ b/drivers/misc/xilinx_tmr_inject.c
@@ -143,11 +143,10 @@ static int xtmr_inject_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int xtmr_inject_remove(struct platform_device *pdev)
+static void xtmr_inject_remove(struct platform_device *pdev)
 {
 	debugfs_remove_recursive(dbgfs_root);
 	dbgfs_root = NULL;
-	return 0;
 }
 
 static const struct of_device_id xtmr_inject_of_match[] = {
@@ -164,7 +163,7 @@ static struct platform_driver xtmr_inject_driver = {
 		.of_match_table = xtmr_inject_of_match,
 	},
 	.probe = xtmr_inject_probe,
-	.remove = xtmr_inject_remove,
+	.remove_new = xtmr_inject_remove,
 };
 module_platform_driver(xtmr_inject_driver);
 MODULE_AUTHOR("Advanced Micro Devices, Inc");
-- 
2.43.0