On Fri, 6 Apr 2012, Andreas Schwab wrote:

> Grant Likely <[email protected]> writes:
> 
> > Can you attach console output logs for each of configs above and also
> > with NR_IRQS=128?  That might give me some clues as to which specific
> > code is causing the issues.
> 
> It really looks like the issue starts when irq_expand_nr_irqs is called
> the first time to make nr_irqs bigger than NR_IRQS.

And it looks like the irqdomain code is the real culprit.

void irq_set_virq_count(unsigned int count)
{
        pr_debug("irq: Trying to set virq count to %d\n", count);

        BUG_ON(count < NUM_ISA_INTERRUPTS);
        if (count < NR_IRQS)
                irq_virq_count = count;
}

That looks simply wrong.....

s/NR_IRQS/nr_irqs/ should do the trick.

Thanks,

        tglx
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