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SubjectRe: [PATCH] pata_of_platform: fix no irq handling
> > This was discussed years ago.
> >
> >
> >
> >
> Would this break any existing platforms? If so, can those be fixed
> together or does it become a much bigger problem that way?

Zero means no IRQ. Any platform with bits of code left over exposing IRQ
0 is already not supported by lots of driver code including libata.

As IRQs are unsigned using -1 is asking for trouble

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