Commit 12026ea1 authored Dec 26, 2008 by Yinghai Lu Committed by Ingo Molnar Dec 27, 2008

sparseirq: fix hang with !SPARSE_IRQ



Impact: fix hang

Suresh report his two sockets system only works with SPARSE_IRQ enable
it turns out we miss the setting desc->irq

so provide early_irq_init() even !SPARSE_IRQ to set desc->irq

Reported-by: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent fa6beb37

kernel/irq/handle.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -218,6 +218,21 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
		}
		};

		int __init early_irq_init(void)
		{
		struct irq_desc *desc;
		int count;
		int i;

		desc = irq_desc;
		count = ARRAY_SIZE(irq_desc);

		for (i = 0; i < count; i++)
		desc[i].irq = i;

		return arch_early_irq_init();
		}

		struct irq_desc *irq_to_desc(unsigned int irq)
		{
		return (irq < NR_IRQS) ? irq_desc + irq : NULL;