linux-kernel - [PATCH] soc: samsung: Add missing of_node

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Date:   Wed, 15 Jun 2022 16:55:25 +0800
From:   heliang <windhl@....com>
To:     krzysztof.kozlowski@...aro.org, alim.akhtar@...sung.com
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        windhl@....com
Subject: [PATCH] soc: samsung: Add missing of_node_put in exynos-pmu.c

In exynos_get_pmu_regmap(), of_find_matching_node() will return a
node pointer with refcount incremented. We should use of_node_put()
for that node pointer. We need a similar code logic in the function
syscon_regmap_lookup_by_compatible().

Signed-off-by: heliang <windhl@....com>
---
 drivers/soc/samsung/exynos-pmu.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/soc/samsung/exynos-pmu.c b/drivers/soc/samsung/exynos-pmu.c
index 732c86ce2be8..a44862c405a4 100644
--- a/drivers/soc/samsung/exynos-pmu.c
+++ b/drivers/soc/samsung/exynos-pmu.c
@@ -108,9 +108,13 @@ struct regmap *exynos_get_pmu_regmap(void)
 {
 	struct device_node *np = of_find_matching_node(NULL,
 						      exynos_pmu_of_device_ids);
-	if (np)
-		return syscon_node_to_regmap(np);
-	return ERR_PTR(-ENODEV);
+	struct regmap *regmap;
+	if (!np)
+		return ERR_PTR(-ENODEV);
+	
+	regmap = syscon_node_to_regmap(np);
+	of_node_put(np);
+	return regmap;
 }
 EXPORT_SYMBOL_GPL(exynos_get_pmu_regmap);
 
-- 
2.25.1