Problems with 2_4_devel & MVME2600 serial interrupts

[Hollis Blanchard]

On Fri, 2002-10-18 at 09:59, Anders Blomdell wrote:
>
> > 2. When the interrupts gets enabled, the system gets an interrupt and
> > eventually
> >    calls i8259_irq, which reads 0xff from pci_intack, which it will
> > continue to
> >    do	forever in this loop (do_IRQ, arch/kernel/irq.c):
>
> A quick (and working, but probably unclean) solution is call
> 'i8259_init(intack_addr)' with intack_addr set to zero (instead of the
> 0xbffffff0 from prep_setup.c), thus forcing the interrupt to be polled from
> the 8259 controller. Could somebody who understands open_pic (is this a
> relative to MPIC?), give me a hint of suitable further reading before I to
> try to clean this up?

Seems to me that either:
a) the pci_intack value is incorrect for your board, in which case you
should correct it
b) your board's int-ack feature is broken and you'll need to poll

-Hollis

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