Patch "soc: qcom: smem_state: Add refcounting for the 'state->of_node'" has been added to the 4.19-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

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

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     soc-qcom-smem_state-add-refcounting-for-the-state-of.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit f03c4a2863dfc38a5c8cc35d7697117d7fd7a691
Author: Liang He <windhl@xxxxxxx>
Date:   Thu Jul 21 21:52:17 2022 +0800

    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@xxxxxxx>
    Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20220721135217.1301039-2-windhl@xxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/soc/qcom/smem_state.c b/drivers/soc/qcom/smem_state.c
index d5437ca76ed9..1502cf037a6b 100644
--- a/drivers/soc/qcom/smem_state.c
+++ b/drivers/soc/qcom/smem_state.c
@@ -144,6 +144,7 @@ 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);
 }
 
@@ -177,7 +178,7 @@ 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;