linux-kernel - [PATCH 5.18 093/141] irqchip/apple-aic: Fix refcount leak in aic_of_ic

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Message-Id: <20220620124732.294192757@linuxfoundation.org>
Date:   Mon, 20 Jun 2022 14:50:31 +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, Miaoqian Lin <linmq006@...il.com>,
        Marc Zyngier <maz@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 093/141] irqchip/apple-aic: Fix refcount leak in aic_of_ic_init

From: Miaoqian Lin <linmq006@...il.com>

[ Upstream commit 3d45670fab3c25a7452721e4588cc95c51cda134 ]

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: a5e8801202b3 ("irqchip/apple-aic: Parse FIQ affinities from device-tree")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20220601080930.31005-4-linmq006@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/irqchip/irq-apple-aic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 478d0af16d9f..5ac83185ff47 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -1144,6 +1144,7 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p
 		for_each_child_of_node(affs, chld)
 			build_fiq_affinity(irqc, chld);
 	}
+	of_node_put(affs);
 
 	set_handle_irq(aic_handle_irq);
 	set_handle_fiq(aic_handle_fiq);
-- 
2.35.1