linux-kernel - [PATCH 3/7] irqchip/loongson-htvec: Check return value of irq_domain_translate

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Message-Id: <1592902276-3969-4-git-send-email-yangtiezhu@loongson.cn>
Date:   Tue, 23 Jun 2020 16:51:12 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>, Rob Herring <robh+dt@...nel.org>
Cc:     Guo Ren <guoren@...nel.org>, Baruch Siach <baruch@...s.co.il>,
        Huacai Chen <chenhc@...ote.com>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Tony Lindgren <tony@...mide.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-csky@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mips@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-samsung-soc@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>
Subject: [PATCH 3/7] irqchip/loongson-htvec: Check return value of irq_domain_translate_onecell()

Check the return value of irq_domain_translate_onecell() due to
it may returns -EINVAL if failed.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 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 b36d403..720cf96 100644
--- a/drivers/irqchip/irq-loongson-htvec.c
+++ b/drivers/irqchip/irq-loongson-htvec.c
@@ -109,11 +109,14 @@ static struct irq_chip htvec_irq_chip = {
 static int htvec_domain_alloc(struct irq_domain *domain, unsigned int virq,
 			      unsigned int nr_irqs, void *arg)
 {
+	int ret;
 	unsigned long hwirq;
 	unsigned int type, i;
 	struct htvec *priv = domain->host_data;
 
-	irq_domain_translate_onecell(domain, arg, &hwirq, &type);
+	ret = irq_domain_translate_onecell(domain, arg, &hwirq, &type);
+	if (ret)
+		return ret;
 
 	for (i = 0; i < nr_irqs; i++) {
 		irq_domain_set_info(domain, virq + i, hwirq + i, &htvec_irq_chip,
-- 
2.1.0