[PATCH 4.17 089/324] irqchip/gic-v2m: Fix SPI release on error path

Greg Kroah-Hartman
2018-08-23T09:13:02Z

From: Marc Zyngier <marc.zyngier@arm.com>

[ Upstream commit cbaf45a6be497c272e80500e4fd9bccdf20d5050 ]

On failing to allocate the required SPIs, the actual number of interrupts
should be freed and not its log2 value.

Fixes: de337ee30142 ("irqchip/gic-v2m: Add PCI Multi-MSI support")
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Yang Yingliang <yangyingliang@huawei.com>
Cc: Sumit Garg <sumit.garg@linaro.org>
Link: https://lkml.kernel.org/r/20180622095254.5906-4-marc.zyngier@arm.com
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/irqchip/irq-gic-v2m.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/irqchip/irq-gic-v2m.c
+++ b/drivers/irqchip/irq-gic-v2m.c
@@ -199,7 +199,7 @@ static int gicv2m_irq_domain_alloc(struc

fail:
irq_domain_free_irqs_parent(domain, virq, nr_irqs);
- gicv2m_unalloc_msi(v2m, hwirq, get_count_order(nr_irqs));
+ gicv2m_unalloc_msi(v2m, hwirq, nr_irqs);
return err;
}