| From | Sasha Levin <> | Subject | [PATCH AUTOSEL for 4.9 204/293] irqchip/gic-v2: Report failures in gic_irq_domain_alloc | Date | Mon, 9 Apr 2018 00:25:33 +0000 |
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From: Suzuki K Poulose <suzuki.poulose@arm.com>
[ Upstream commit 456c59c31c5126fe31c64956c43670060ea9debd ]
If the GIC cannot map an IRQ via irq_domain_ops->alloc(), it doesn't return an error code. This can cause a problem with drivers, where it thinks it has successfully got an IRQ for the device, but requesting the same ends up failure with -ENOSYS (as the IRQ's chip is not set).
Fixes: commit 9a1091ef0017c ("irqchip: gic: Support hierarchy irq domain.") Cc: Yingjoe Chen <yingjoe.chen@mediatek.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> --- drivers/irqchip/irq-gic.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index d6c404b3584d..230a4da1e196 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -1027,8 +1027,11 @@ static int gic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, if (ret) return ret; - for (i = 0; i < nr_irqs; i++) - gic_irq_domain_map(domain, virq + i, hwirq + i); + for (i = 0; i < nr_irqs; i++) { + ret = gic_irq_domain_map(domain, virq + i, hwirq + i); + if (ret) + return ret; + } return 0; } -- 2.15.1
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