linux-kernel - [PATCH v3 01/14 RESEND] irqchip/ath79-misc: Fix potential resource leaks

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Date:   Wed, 24 Jun 2020 15:44:58 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>
Subject: [PATCH v3 01/14 RESEND] irqchip/ath79-misc: Fix potential resource leaks

There exists potential resource leaks in the error path, fix them.

Fixes: 07ba4b061a79 ("irqchip/ath79-misc: Move the MISC driver from arch/mips/ath79/")
Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 drivers/irqchip/irq-ath79-misc.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-ath79-misc.c b/drivers/irqchip/irq-ath79-misc.c
index 3d641bb..53e0c50 100644
--- a/drivers/irqchip/irq-ath79-misc.c
+++ b/drivers/irqchip/irq-ath79-misc.c
@@ -133,7 +133,7 @@ static int __init ath79_misc_intc_of_init(
 {
 	struct irq_domain *domain;
 	void __iomem *base;
-	int irq;
+	int irq, ret;
 
 	irq = irq_of_parse_and_map(node, 0);
 	if (!irq) {
@@ -144,18 +144,26 @@ static int __init ath79_misc_intc_of_init(
 	base = of_iomap(node, 0);
 	if (!base) {
 		pr_err("Failed to get MISC IRQ registers\n");
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto err_irq_dispose;
 	}
 
 	domain = irq_domain_add_linear(node, ATH79_MISC_IRQ_COUNT,
 				&misc_irq_domain_ops, base);
 	if (!domain) {
 		pr_err("Failed to add MISC irqdomain\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto err_iounmap;
 	}
 
 	ath79_misc_intc_domain_init(domain, irq);
 	return 0;
+
+err_iounmap:
+	iounmap(base);
+err_irq_dispose:
+	irq_dispose_mapping(irq);
+	return ret;
 }
 
 static int __init ar7100_misc_intc_of_init(
-- 
2.1.0