Commit 6f8a0ed4 authored by Jeremy Fitzhardinge's avatar Jeremy Fitzhardinge Committed by Ingo Molnar
Browse files

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: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 17483a1f

drivers/xen/events.c

+5 −0
Original line number Diff line number Diff line
@@ -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;

}