[PATCH] [media] media: mtk-mdp: fix reference count on old device tree

[Matthias Brugger]

of_get_next_child() increments the reference count of the returning
device_node. Decrement it in the check if we are using the old or the
new DTB.

Fixes: ba1f1f70c2c0 ("[media] media: mtk-mdp: Fix mdp device tree")
Signed-off-by: Matthias Brugger <matthias....@gmail.com>
---
 drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c 
b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
index bbb24fb95b95..bafe53c5d54a 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
@@ -118,7 +118,9 @@ static int mtk_mdp_probe(struct platform_device *pdev)
        mutex_init(&mdp->vpulock);
 
        /* Old dts had the components as child nodes */
-       if (of_get_next_child(dev->of_node, NULL)) {
+       parent = of_get_next_child(dev->of_node, NULL);
+       if (parent) {
+               of_node_put(parent);
                parent = dev->of_node;
                dev_warn(dev, "device tree is out of date\n");
        } else {
-- 
2.21.0