• Benjamin Herrenschmidt's avatar
    [POWERPC] Don't get PCI IRQ from OF for devices with no IRQ · 41550c51
    Benjamin Herrenschmidt authored
    This patch adds checking of the PCI_INTERRUPT_PIN register before
    using standard OF parsing to retreive PCI interrupts. The reason is
    that some PCI devices may have no PCI interrupt, though they may have
    interrupts attached via other means. In this case, we shall not use
    irq->pdev, but device-specific code can later retreive those interrupts
    Without that patch, Maple and derivatives don't get the right interrupt
    for the second IDE channel as the linux IDE code fallsback to the PCI
    irq instead of trying to use the legacy ones for the on-board controller
    (which has no PCI_INTERRUPT_PIN). Having no PCI IRQ assign to it (as it
    doesn't request any) fixes it.
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
prom_parse.c 24 KB