linux-kernel - [PATCH 5.8 063/464] irqchip/loongson-htvec: Fix potential resource leak

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Date:   Mon, 17 Aug 2020 17:10:16 +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, Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Marc Zyngier <maz@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.8 063/464] irqchip/loongson-htvec: Fix potential resource leak

From: Tiezhu Yang <yangtiezhu@...ngson.cn>

[ Upstream commit 652d54e77a438cf38a5731d8f9983c81e72dc429 ]

In the function htvec_of_init(), system resource "parent_irq"
was not released in an error case. Thus add a jump target for
the completion of the desired exception handling.

Fixes: 818e915fbac5 ("irqchip: Add Loongson HyperTransport Vector support")
Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/1594087972-21715-4-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/irqchip/irq-loongson-htvec.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-loongson-htvec.c b/drivers/irqchip/irq-loongson-htvec.c
index 1ece9337c78dc..b36d403383230 100644
--- a/drivers/irqchip/irq-loongson-htvec.c
+++ b/drivers/irqchip/irq-loongson-htvec.c
@@ -192,7 +192,7 @@ static int htvec_of_init(struct device_node *node,
 	if (!priv->htvec_domain) {
 		pr_err("Failed to create IRQ domain\n");
 		err = -ENOMEM;
-		goto iounmap_base;
+		goto irq_dispose;
 	}
 
 	htvec_reset(priv);
@@ -203,6 +203,9 @@ static int htvec_of_init(struct device_node *node,
 
 	return 0;
 
+irq_dispose:
+	for (; i > 0; i--)
+		irq_dispose_mapping(parent_irq[i - 1]);
 iounmap_base:
 	iounmap(priv->base);
 free_priv:
-- 
2.25.1