Commit 050e07f8765d for kernel

commit 050e07f8765d84b4e74fae239ff7a9f29eb6869c
Author: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Date:   Sun Jul 26 22:56:09 2026 -0300

    net: dsa: realtek: use devm_mutex_init for regmap 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: 907e772f6f6de ("net: dsa: realtek: allow subdrivers to externally lock regmap")
    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-v2-2-5d62ba998791@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 71124ecca92f..9402bfe4f85a 100644
--- a/drivers/net/dsa/realtek/rtl83xx.c
+++ b/drivers/net/dsa/realtek/rtl83xx.c
@@ -156,7 +156,10 @@ rtl83xx_probe(struct device *dev,
 	if (!priv)
 		return ERR_PTR(-ENOMEM);

-	mutex_init(&priv->map_lock);
+	ret = devm_mutex_init(dev, &priv->map_lock);
+	if (ret)
+		return ERR_PTR(ret);
+
 	mutex_init(&priv->vlan_lock);
 	mutex_init(&priv->l2_lock);