Re: expicitly use XT_PIC interrupt for an old device?

Zhao Yakui
2008-08-12T00:55:23Z

On Mon, 2008-08-11 at 16:59 +0200, Dieter Schön wrote:
> hi group,
>
> i have to migrate a character device driver for an old synchronus
> serial PCI board (Moxa C502/PCI)
> from 2.2.something to 2.6.5-smp x86_64.
> the problem is, that no interrupts are routed to the driver.
> i was able to get interrupts when i used a non-SMP kernel and the
> "noapic" boot option.
>
> is there a way to explicitly force the use of the 8259 when i request
> an interrupt to get the interrupts for this card not routed via the
> APIC?
> any pointers are appreciated.
doubt whether the I8259 and I/O APIC can be used at the same time.
When the non-smp kernel is used and boot option of "noapic" is added,
there exists the interrupt for PCI UART card.
Do you try it with the boot option of "noapic" on smp kernel?
Can you try it on the latest kernel?
Thanks.
> thanks in advance,
> dieter
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