[PATCH AUTOSEL 5.8 61/72] irqchip/loongson-pch-pic: Check return value of irq_domain_translate_twocell()

Sasha Levin
2020-08-08T23:37:12Z

From: Tiezhu Yang <yangtiezhu@loongson.cn>

[ Upstream commit 66a535c495f72e1deacc37dfa34acca2a06e3578 ]

Check the return value of irq_domain_translate_twocell() due to
it may returns -EINVAL if failed and use variable fwspec for it,
and then use a new variable parent_fwspec which is proper for
irq_domain_alloc_irqs_parent().

Fixes: ef8c01eb64ca ("irqchip: Add Loongson PCH PIC controller")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1594087972-21715-6-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/irqchip/irq-loongson-pch-pic.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/irqchip/irq-loongson-pch-pic.c b/drivers/irqchip/irq-loongson-pch-pic.c
index 2a05b9305012b..016f32c4cbe18 100644
--- a/drivers/irqchip/irq-loongson-pch-pic.c
+++ b/drivers/irqchip/irq-loongson-pch-pic.c
@@ -135,16 +135,19 @@ static int pch_pic_alloc(struct irq_domain *domain, unsigned int virq,
int err;
unsigned int type;
unsigned long hwirq;
- struct irq_fwspec fwspec;
+ struct irq_fwspec *fwspec = arg;
+ struct irq_fwspec parent_fwspec;
struct pch_pic *priv = domain->host_data;

- irq_domain_translate_twocell(domain, arg, &hwirq, &type);
+ err = irq_domain_translate_twocell(domain, fwspec, &hwirq, &type);
+ if (err)
+ return err;

- fwspec.fwnode = domain->parent->fwnode;
- fwspec.param_count = 1;
- fwspec.param[0] = hwirq + priv->ht_vec_base;
+ parent_fwspec.fwnode = domain->parent->fwnode;
+ parent_fwspec.param_count = 1;
+ parent_fwspec.param[0] = hwirq + priv->ht_vec_base;

- err = irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec);
+ err = irq_domain_alloc_irqs_parent(domain, virq, 1, &parent_fwspec);
if (err)
return err;

--
2.25.1