soc: qcom: smem_state: Add refcounting for the 'state->of_node'

[ Upstream commit 90681f53b9381c23ff7762a3b13826d620c272de ]

In qcom_smem_state_register() and qcom_smem_state_release(), we
should better use of_node_get() and of_node_put() for the reference
creation and destruction of 'device_node'.

Fixes: 9460ae2ff308 ("soc: qcom: Introduce common SMEM state machine code")
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220721135217.1301039-2-windhl@126.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/soc/qcom/smem_state.c b/drivers/soc/qcom/smem_state.c
index 31faf4aa868e60d5c9d06df9354772a7ff549464..e848cc9a3cf801be1743e4ac1bcfc2701ae993df 100644 (file)
--- a/drivers/soc/qcom/smem_state.c
+++ b/drivers/soc/qcom/smem_state.c
@@ -136,6 +136,7 @@ static void qcom_smem_state_release(struct kref *ref)
        struct qcom_smem_state *state = container_of(ref, struct qcom_smem_state, refcount);
 
        list_del(&state->list);
+       of_node_put(state->of_node);
        kfree(state);
 }
 
@@ -205,7 +206,7 @@ struct qcom_smem_state *qcom_smem_state_register(struct device_node *of_node,
 
        kref_init(&state->refcount);
 
-       state->of_node = of_node;
+       state->of_node = of_node_get(of_node);
        state->ops = *ops;
        state->priv = priv;