sparseirq, xen: make sure irq_desc is allocated for interrupts
Impact: fix crash
Make sure all Xen irqs have an irq_desc.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 2924faa..46625cd 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -233,6 +233,7 @@
static int find_unbound_irq(void)
{
int irq;
+ struct irq_desc *desc;
/* Only allocate from dynirq range */
for (irq = 0; irq < nr_irqs; irq++)
@@ -242,6 +243,10 @@
if (irq == nr_irqs)
panic("No available IRQ to bind to: increase nr_irqs!\n");
+ desc = irq_to_desc_alloc_cpu(irq, 0);
+ if (WARN_ON(desc == NULL))
+ return -1;
+
return irq;
}