linux-kernel - [PATCH 5.15 332/779] mediatek: mt76: eeprom: fix missing of_node_put() in mt76_find_power_limits

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Message-Id: <20220815180351.473557798@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:59:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Liang He <windhl@....com>,
        Felix Fietkau <nbd@....name>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 332/779] mediatek: mt76: eeprom: fix missing of_node_put() in mt76_find_power_limits_node()

From: Liang He <windhl@....com>

[ Upstream commit 3bd53ea02d77917c2314ec7be9e2d05be22f87d3 ]

We should use of_node_put() for the reference 'np' returned by
of_get_child_by_name() which will increase the refcount.

Fixes: 22b980badc0f ("mt76: add functions for parsing rate power limits from DT")
Signed-off-by: Liang He <windhl@....com>
Signed-off-by: Felix Fietkau <nbd@....name>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/mediatek/mt76/eeprom.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/eeprom.c b/drivers/net/wireless/mediatek/mt76/eeprom.c
index 3b47e85e95e7..db0cd56c8dc7 100644
--- a/drivers/net/wireless/mediatek/mt76/eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/eeprom.c
@@ -146,10 +146,13 @@ mt76_find_power_limits_node(struct mt76_dev *dev)
 		}
 
 		if (mt76_string_prop_find(country, dev->alpha2) ||
-		    mt76_string_prop_find(regd, region_name))
+		    mt76_string_prop_find(regd, region_name)) {
+			of_node_put(np);
 			return cur;
+		}
 	}
 
+	of_node_put(np);
 	return fallback;
 }
 
-- 
2.35.1