[PATCH 5.10 200/390] clk: sprd: Hold reference returned by of_get_parent()

[Greg Kroah-Hartman]

From: Liang He <windhl@xxxxxxx>

[ Upstream commit 91e6455bf715fb1558a0bf8f645ec1c131254a3c ]

We should hold the reference returned by of_get_parent() and use it
to call of_node_put() for refcount balance.

Fixes: f95e8c7923d1 ("clk: sprd: support to get regmap from parent node")
Signed-off-by: Liang He <windhl@xxxxxxx>
Link: https://lore.kernel.org/r/20220704004729.272481-1-windhl@xxxxxxx
Reviewed-by: Orson Zhai <orsonzhai@xxxxxxxxx>
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/clk/sprd/common.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/sprd/common.c b/drivers/clk/sprd/common.c
index d620bbbcdfc8..ce81e4087a8f 100644
--- a/drivers/clk/sprd/common.c
+++ b/drivers/clk/sprd/common.c
@@ -41,7 +41,7 @@ int sprd_clk_regmap_init(struct platform_device *pdev,
 {
 	void __iomem *base;
 	struct device *dev = &pdev->dev;
-	struct device_node *node = dev->of_node;
+	struct device_node *node = dev->of_node, *np;
 	struct regmap *regmap;
 
 	if (of_find_property(node, "sprd,syscon", NULL)) {
@@ -50,9 +50,10 @@ int sprd_clk_regmap_init(struct platform_device *pdev,
 			pr_err("%s: failed to get syscon regmap\n", __func__);
 			return PTR_ERR(regmap);
 		}
-	} else if (of_device_is_compatible(of_get_parent(dev->of_node),
-			   "syscon")) {
-		regmap = device_node_to_regmap(of_get_parent(dev->of_node));
+	} else if (of_device_is_compatible(np =	of_get_parent(node), "syscon") ||
+		   (of_node_put(np), 0)) {
+		regmap = device_node_to_regmap(np);
+		of_node_put(np);
 		if (IS_ERR(regmap)) {
 			dev_err(dev, "failed to get regmap from its parent.\n");
 			return PTR_ERR(regmap);
-- 
2.35.1