* Andrew Morton <[email protected]> wrote:
> On Tue, 30 May 2006 14:24:03 -0700
> Roland Dreier <[email protected]> wrote:
>
> > I'm seeing problems with MSI-X interrupts on 2.6.17-rc5-mm1. I'll try
> > to debug the MSI patches in -mm further in the next day or so, but for
> > now I'll post the symptoms.
> >
> > When I load the ib_mthca driver with MSI-X interrupts enabled, I get
> > the following crash as soon as the first interrupt is generated.
>
> 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?
Ingo
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