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sparseirq: fix hang with !SPARSE_IRQ

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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>
This commit is contained in:
Yinghai Lu 2008-12-26 22:38:15 -08:00 committed by Ingo Molnar
parent fa6beb37b0
commit 12026ea16a
1 changed files with 15 additions and 0 deletions
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15
kernel/irq/handle.c
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@ -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;