Messages in this thread | | | Subject | Re: IDE IRQ probe brokenness. | From | Alan Cox <> | Date | 10 Jun 2003 17:42:41 +0100 |
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On Maw, 2003-06-10 at 09:33, David Woodhouse wrote: > I have on my desk a machine where all PCI interrupts are routed to > IRQ 0. > > The IDE code doesn't seem very happy with it -- it seems to think that > hwif->irq == 0 means that no IRQ has been set. It should be using -1 for > that instead. > > This error is in both 2.4 and 2.5.
It isn't clear that -1 is safe either. One thing I would suggest for your latest weird embedded beastie is that you tweak the IRQ assignment so IRQ 0 disappears or becomes IRQ 63 or something. IDE does have this problem, but so does USB and a lot of other code.
Basically we need a "NOT_AN_IRQ" value defined either globally or per port
Alan
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