From: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Date: Mon, 27 Jul 2026 01:56:11 +0000 (-0300)
Subject: net: dsa: realtek: use devm_mutex_init for l2_lock
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=442ecdc83d00d6c2312541c4e0ada47e02805fcb;p=thirdparty%2Fkernel%2Fstable.git

net: dsa: realtek: use devm_mutex_init for l2_lock

With CONFIG_DEBUG_MUTEXES enabled, mutex_destroy() needs to be called
before the lock is discarded. Use devm_mutex_init() instead so the
cleanup is handled automatically.

Fixes: 336e3e4a1ab37 ("net: dsa: realtek: rtl8365mb: add FDB support")
Reviewed-by: Mieczyslaw Nalewaj <namiltd@yahoo.com>
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Alvin Šipraga <alvin.sipraga@analog.com>
Link: https://patch.msgid.link/20260726-realtek_mutext-v2-4-5d62ba998791@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/drivers/net/dsa/realtek/rtl83xx.c b/drivers/net/dsa/realtek/rtl83xx.c
index 9f40afb19ab2..9dd50b20c000 100644
--- a/drivers/net/dsa/realtek/rtl83xx.c
+++ b/drivers/net/dsa/realtek/rtl83xx.c
@@ -164,7 +164,9 @@ rtl83xx_probe(struct device *dev,
 	if (ret)
 		return ERR_PTR(ret);
 
-	mutex_init(&priv->l2_lock);
+	ret = devm_mutex_init(dev, &priv->l2_lock);
+	if (ret)
+		return ERR_PTR(ret);
 
 	rc.lock_arg = priv;
 	priv->map = devm_regmap_init(dev, NULL, priv, &rc);