linux-kernel - [PATCH] pinctrl: stm32: Fix refcount leak in stm32_pctrl_get_irq

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Date:   Mon,  2 Jan 2023 12:24:56 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Fabien Dessenne <fabien.dessenne@...s.st.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Marek Vasut <marex@...x.de>, Miaoqian Lin <linmq006@...il.com>,
        linux-gpio@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] pinctrl: stm32: Fix refcount leak in stm32_pctrl_get_irq_domain

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: d86f4d71e42a ("pinctrl: stm32: check irq controller availability at probe")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/pinctrl/stm32/pinctrl-stm32.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
index 1cddca506ad7..cb33a23ab0c1 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -1382,6 +1382,7 @@ static struct irq_domain *stm32_pctrl_get_irq_domain(struct platform_device *pde
 		return ERR_PTR(-ENXIO);
 
 	domain = irq_find_host(parent);
+	of_node_put(parent);
 	if (!domain)
 		/* domain not registered yet */
 		return ERR_PTR(-EPROBE_DEFER);
-- 
2.25.1