linux-kernel - [PATCH] platform/x86: xiaomi-wmi: Use devm_mutex

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Message-ID: <bb5d7a57e11eb580f610276a351a01a993341fb8.1757239732.git.christophe.jaillet@wanadoo.fr>
Date: Sun,  7 Sep 2025 12:09:09 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Hans de Goede <hansg@...nel.org>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	platform-driver-x86@...r.kernel.org
Subject: [PATCH] platform/x86: xiaomi-wmi: Use devm_mutex_init()

Use devm_mutex_init() instead of hand-writing it.

This saves some LoC, improves readability and saves some space in the
generated .o file.

Before:
======
   text	   data	    bss	    dec	    hex	filename
   3520	   1112	     64	   4696	   1258	drivers/platform/x86/xiaomi-wmi.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
   3069	   1040	     64	   4173	   104d	drivers/platform/x86/xiaomi-wmi.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/platform/x86/xiaomi-wmi.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/drivers/platform/x86/xiaomi-wmi.c b/drivers/platform/x86/xiaomi-wmi.c
index cbed29ca502a..b892007b9863 100644
--- a/drivers/platform/x86/xiaomi-wmi.c
+++ b/drivers/platform/x86/xiaomi-wmi.c
@@ -26,13 +26,6 @@ struct xiaomi_wmi {
 	unsigned int key_code;
 };
 
-static void xiaomi_mutex_destroy(void *data)
-{
-	struct mutex *lock = data;
-
-	mutex_destroy(lock);
-}
-
 static int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context)
 {
 	struct xiaomi_wmi *data;
@@ -46,8 +39,7 @@ static int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context)
 		return -ENOMEM;
 	dev_set_drvdata(&wdev->dev, data);
 
-	mutex_init(&data->key_lock);
-	ret = devm_add_action_or_reset(&wdev->dev, xiaomi_mutex_destroy, &data->key_lock);
+	ret = devm_mutex_init(&wdev->dev, &data->key_lock);
 	if (ret < 0)
 		return ret;
 
-- 
2.51.0