reset: k210: fix OF node leak in probe() error path

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@linaro.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240825-reset-cleanup-scoped-v1-2-03f6d834f8c0@linaro.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

diff --git a/drivers/reset/reset-k210.c b/drivers/reset/reset-k210.c
index b62a2fd44e4e42fe54a34b56688f1ea908eb8dd7..e77e4cca377dca3331390e9d8f137f4fcd77d176 100644 (file)
--- a/drivers/reset/reset-k210.c
+++ b/drivers/reset/reset-k210.c
@@ -90,7 +90,7 @@ 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");
@@ -99,6 +99,7 @@ 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))