> irq_of_parse_and_map() returns NO_IRQ when the irq parameter is missing. > > This API appears to be broken. In asm-powerpc/irq.h NO_IRQ is defined > as (0). There is no way to tell an error in the attribute from a valid > attribute selecting interrupt zero.
No, it is not broken. Interrupt numbers in arch/powerpc are virtually mapped and 0 is never a legal value, thus NO_IRQ is 0. This was done in part because Linus wanted it that way. The hardware number can perfectly be 0 though, that's a different thing, and has nothing to do with what you pass to request_irq(). Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
