linux-kernel - [PATCH v2] soc: samsung: Add missing of_node

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Message-Id: <20220615135659.3967956-1-windhl@126.com>
Date:   Wed, 15 Jun 2022 21:56:59 +0800
From:   Liang He <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 v2] 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: Liang He <windhl@....com>
---
 changelog:
 v2: (1) use formal name; (2) add a blank line advised by Krzysztof
 v1: fix the missing of_node_put() problem

 drivers/soc/samsung/exynos-pmu.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/soc/samsung/exynos-pmu.c b/drivers/soc/samsung/exynos-pmu.c
index 732c86ce2be8..ad0a94d1d88d 100644
--- a/drivers/soc/samsung/exynos-pmu.c
+++ b/drivers/soc/samsung/exynos-pmu.c
@@ -108,9 +108,14 @@ 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