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>
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@ -233,6 +233,7 @@ static void unmask_evtchn(int port)
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static int find_unbound_irq(void)
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{
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int irq;
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struct irq_desc *desc;
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/* Only allocate from dynirq range */
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for (irq = 0; irq < nr_irqs; irq++)
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@ -242,6 +243,10 @@ static int find_unbound_irq(void)
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if (irq == nr_irqs)
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panic("No available IRQ to bind to: increase nr_irqs!\n");
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desc = irq_to_desc_alloc_cpu(irq, 0);
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if (WARN_ON(desc == NULL))
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return -1;
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return irq;
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}
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