linux-kernel - [PATCH] mfd: max77620: Fix refcount leak in max77620_initialise

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Message-Id: <20220601043222.64441-1-linmq006@gmail.com>
Date:   Wed,  1 Jun 2022 08:32:22 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Lee Jones <lee.jones@...aro.org>,
        Mallikarjun Kasoju <mkasoju@...dia.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Laxman Dewangan <ldewangan@...dia.com>,
        linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] mfd: max77620: Fix refcount leak in max77620_initialise_fps

of_get_child_by_name() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

Fixes: 327156c59360 ("mfd: max77620: Add core driver for MAX77620/MAX20024")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/mfd/max77620.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
index fec2096474ad..a6661e07035b 100644
--- a/drivers/mfd/max77620.c
+++ b/drivers/mfd/max77620.c
@@ -419,9 +419,11 @@ static int max77620_initialise_fps(struct max77620_chip *chip)
 		ret = max77620_config_fps(chip, fps_child);
 		if (ret < 0) {
 			of_node_put(fps_child);
+			of_node_put(fps_np);
 			return ret;
 		}
 	}
+	of_node_put(fps_np);
 
 	config = chip->enable_global_lpm ? MAX77620_ONOFFCNFG2_SLP_LPM_MSK : 0;
 	ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
-- 
2.25.1