On Tue, 11 Jun 2013, Sebastian Hesselbarth wrote:
> On 06/11/13 15:45, Thomas Gleixner wrote:
> > But what about the bit in of that first irq in the cause register? If
> > it's set on entry you call generic_handle_irq() for that as well. So
> > if it's set you need to mask it in stat. If not, then it wants a
> > comment.
>
> I am not sure I can follow. orion_bridge_irq_init() maps the first
> parent irq, i.e. hwirq 0 of orion_irq. The parent irq controller
> clears that irq cause when all corresponding chained irqs are
> cleared. The chained (bridge) irqs are cleared by
> orion_bridge_irq_handler above.
That makes sense. I got confused by:
irq = irq_of_parse_and_map(np, 0);
but now I see that it's mapping irq 0 of the parent interrupt
controller. I'll add a comment before merging it.
Thanks,
tglx
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