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sparseirq, xen: make sure irq_desc is allocated for interrupts

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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>
This commit is contained in:
Jeremy Fitzhardinge 2008-12-17 13:42:29 -08:00 committed by Ingo Molnar
parent 17483a1f34
commit 6f8a0ed4e5
1 changed files with 5 additions and 0 deletions
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5
drivers/xen/events.c
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@ -233,6 +233,7 @@ static void unmask_evtchn(int port)
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 @@ static int find_unbound_irq(void)
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;
}