soc: rockchip: Fix refcount leak in rockchip_grf_init

stable inclusion
from stable-v5.10.122
commit 5b3e990f85eb034faa461e691e719e8ce9e2a3c8
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5W6OE

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=5b3e990f85eb034faa461e691e719e8ce9e2a3c8

--------------------------------

[ Upstream commit 9b59588d ]

of_find_matching_node_and_match returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

Fixes: 4c58063d ("soc: rockchip: add driver handling grf setup")
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220516072013.19731-1-linmq006@gmail.comSigned-off-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>

drivers/soc/rockchip/grf.c

@@ -148,12 +148,14 @@ static int __init rockchip_grf_init(void)
 		return -ENODEV;
 	if (!match || !match->data) {
 		pr_err("%s: missing grf data\n", __func__);
+		of_node_put(np);
 		return -EINVAL;
 	}
 
 	grf_info = match->data;
 
 	grf = syscon_node_to_regmap(np);
+	of_node_put(np);
 	if (IS_ERR(grf)) {
 		pr_err("%s: could not get grf syscon\n", __func__);
 		return PTR_ERR(grf);