From eff4780f83d0ae3e5b6c02ff5d999dc4c1c5c8ce Mon Sep 17 00:00:00 2001
From: Miaoqian Lin <linmq006@gmail.com>
Date: Wed, 1 Jun 2022 12:09:30 +0400
Subject: [PATCH] irqchip/realtek-rtl: Fix refcount leak in map_interrupts
Git-commit: eff4780f83d0ae3e5b6c02ff5d999dc4c1c5c8ce
Patch-mainline: v5.19-rc3
References: git-fixes

of_find_node_by_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
This function doesn't call of_node_put() in error path.
Call of_node_put() directly after of_property_read_u32() to cover
both normal path and error path.

Fixes: 9f3a0f34b84a ("irqchip: Add support for Realtek RTL838x/RTL839x interrupt controller")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220601080930.31005-7-linmq006@gmail.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/irqchip/irq-realtek-rtl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-realtek-rtl.c b/drivers/irqchip/irq-realtek-rtl.c
index 50a56820c99b..56bf502d9c67 100644
--- a/drivers/irqchip/irq-realtek-rtl.c
+++ b/drivers/irqchip/irq-realtek-rtl.c
@@ -134,9 +134,9 @@ static int __init map_interrupts(struct device_node *node, struct irq_domain *do
 		if (!cpu_ictl)
 			return -EINVAL;
 		ret = of_property_read_u32(cpu_ictl, "#interrupt-cells", &tmp);
+		of_node_put(cpu_ictl);
 		if (ret || tmp != 1)
 			return -EINVAL;
-		of_node_put(cpu_ictl);
 
 		cpu_int = be32_to_cpup(imap + 2);
 		if (cpu_int > 7 || cpu_int < 2)
-- 
2.35.3