Re: IRQ problem on cobalt / 2.6.6

[Peter Horton <phorton@bitbox.co.uk>]

Maciej W. Rozycki wrote:

> On Tue, 18 May 2004, Kieran Fulke wrote:
>
>  
>
> > alas, no joy.
> >    
> [...]
>  
>
> > VP_IDE: VIA vt82c586a (rev 27) IDE UDMA33 controller on pci0000:00:09.1
> >    ide0: BM-DMA at 0x1420-0x1427, BIOS settings: hda:pio, hdb:pio
> >    ide1: BM-DMA at 0x1428-0x142f, BIOS settings: hdc:pio, hdd:pio
> > spurious 8259A interrupt: IRQ9.
> >    
> Hmm, interesting.  As the 8259A can only signal IRQ7 and possibly IRQ15
> as spurious interrupts, this smells like a bug in 8259A handlers,
> regardless of system-specific problems you have.
>
>  
We were getting interrupt 23 and calling do_IRQ() with a value of 9 (a 
bug, obviously). Interrupt 9 is masked so we get a "spurious 8259A 
interrupt" message.
P.