[PATCH AUTOSEL 5.8 60/72] irqchip/loongson-htvec: Check return value of irq_domain_translate_onecell()

[Sasha Levin]

From: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>

[ Upstream commit dbec37048d27cee36e103e113b5f9b1852bfe997 ]

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

Fixes: 818e915fbac5 ("irqchip: Add Loongson HyperTransport Vector support")
Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/1594087972-21715-5-git-send-email-yangtiezhu@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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 b36d403383230..720cf96ae90ee 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,
-- 
2.25.1