[PATCH 5.15 146/691] reset: k210: fix OF node leak in probe() error path

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5.15-stable review patch.  If anyone has any objections, please let me know.

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

From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>

[ Upstream commit b14e40f5dc7cd0dd7e958010e6ca9ad32ff2ddad ]

Driver is leaking OF node reference on memory allocation failure.
Acquire the OF node reference after memory allocation to fix this and
keep it simple.

Fixes: 5a2308da9f60 ("riscv: Add Canaan Kendryte K210 reset controller")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Reviewed-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240825-reset-cleanup-scoped-v1-2-03f6d834f8c0@xxxxxxxxxx
Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/reset/reset-k210.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/reset/reset-k210.c b/drivers/reset/reset-k210.c
index 1b6e03522b40d..b0f4546b2b1e5 100644
--- a/drivers/reset/reset-k210.c
+++ b/drivers/reset/reset-k210.c
@@ -91,7 +91,7 @@ static const struct reset_control_ops k210_rst_ops = {
 static int k210_rst_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *parent_np = of_get_parent(dev->of_node);
+	struct device_node *parent_np;
 	struct k210_rst *ksr;
 
 	dev_info(dev, "K210 reset controller\n");
@@ -100,6 +100,7 @@ static int k210_rst_probe(struct platform_device *pdev)
 	if (!ksr)
 		return -ENOMEM;
 
+	parent_np = of_get_parent(dev->of_node);
 	ksr->map = syscon_node_to_regmap(parent_np);
 	of_node_put(parent_np);
 	if (IS_ERR(ksr->map))
-- 
2.43.0







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