soc: qcom: smp2p: Fix missing of_node_put() in smp2p_parse_ipc

stable inclusion
from stable-v5.10.121
commit 7cbe94d296c0be9bd3630825b509874667d28a51
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=7cbe94d296c0be9bd3630825b509874667d28a51

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

[ Upstream commit 8fd3f18e ]

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

Fixes: 50e99641 ("soc: qcom: smp2p: Qualcomm Shared Memory Point to Point")
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220308071942.22942-1-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/smp2p.c

@@ -420,6 +420,7 @@ static int smp2p_parse_ipc(struct qcom_smp2p *smp2p)
 	}
 
 	smp2p->ipc_regmap = syscon_node_to_regmap(syscon);
+	of_node_put(syscon);
 	if (IS_ERR(smp2p->ipc_regmap))
 		return PTR_ERR(smp2p->ipc_regmap);