linux-kernel - [PATCH] irqchip/ti-sci: Fix refcount leak in ti_sci_intr_irq_domain

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Message-Id: <20230102085611.3955984-1-linmq006@gmail.com>
Date:   Mon,  2 Jan 2023 12:56:10 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Lokesh Vutla <lokeshvutla@...com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] irqchip/ti-sci: Fix refcount leak in ti_sci_intr_irq_domain_probe

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

Fixes: cd844b0715ce ("irqchip/ti-sci-intr: Add support for Interrupt Router driver")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/irqchip/irq-ti-sci-intr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/irq-ti-sci-intr.c b/drivers/irqchip/irq-ti-sci-intr.c
index fe8fad22bcf9..020ddf29efb8 100644
--- a/drivers/irqchip/irq-ti-sci-intr.c
+++ b/drivers/irqchip/irq-ti-sci-intr.c
@@ -236,6 +236,7 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev)
 	}
 
 	parent_domain = irq_find_host(parent_node);
+	of_node_put(parent_node);
 	if (!parent_domain) {
 		dev_err(dev, "Failed to find IRQ parent domain\n");
 		return -ENODEV;
-- 
2.25.1