Re: 2.6.17-rc5-mm1

Ingo Molnar
2006-05-30T22:52:33Z

* Ingo Molnar <mingo@elte.hu> wrote:

> > do_IRQ() did a jump-to-zero. So there's no handler installed.
>
> yep. No desc->irq_handler. That should be 'impossible' on x86_64,
> because the irq_desc[] array is initialized with handle_bad_irq, and
> from that point on x86_64 only uses set_irq_chip_and_handler(), which
> at most can set it to another (non-NULL) handle_irq function. Weird.
>
> does MSI much with the irq_desc[] separately perhaps, clearing
> handle_irq in the process perhaps?

aha - drivers/pci/msi.c sets msix_irq_type, which has no handle_irq
entry. This needs to be converted to irqchips.

Ingo