soc: qcom: smsm: Fix missing of_node_put() in smsm_parse_ipc

stable inclusion
from stable-v5.10.121
commit a409d0b1f92906e5df0f2ff02f6fe8c319f24869
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6CQ

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=a409d0b1f92906e5df0f2ff02f6fe8c319f24869

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

[ Upstream commit aad66a3c ]

The device_node pointer is returned by of_parse_phandle()  with refcount
incremented. We should use of_node_put() on it when done.

Fixes: c97c4090 ("soc: qcom: smsm: Add driver for Qualcomm SMSM")
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220308073648.24634-1-linmq006@gmail.comSigned-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/soc/qcom/smsm.c

@@ -359,6 +359,7 @@ static int smsm_parse_ipc(struct qcom_smsm *smsm, unsigned host_id)
 		return 0;
 
 	host->ipc_regmap = syscon_node_to_regmap(syscon);
+	of_node_put(syscon);
 	if (IS_ERR(host->ipc_regmap))
 		return PTR_ERR(host->ipc_regmap);