• Paul Bolle's avatar
    x86, ioapic: Don't warn about non-existing IOAPICs if we have none · 678301ec
    Paul Bolle authored
    mp_find_ioapic() prints errors like:
    
        ERROR: Unable to locate IOAPIC for GSI 13
    
    if it can't find the IOAPIC that manages that specific GSI. I
    see errors like that at every boot of a laptop that apparently
    doesn't have any IOAPICs.
    
    But if there are no IOAPICs it doesn't seem to be an error that
    none can be found. A solution that gets rid of this message is
    to directly return if nr_ioapics (still) is zero. (But keep
    returning -1 in that case, so nothing breaks from this change.)
    
    The call chain that generates this error is:
    
    pnpacpi_allocated_resource()
        case ACPI_RESOURCE_TYPE_IRQ:
            pnpacpi_parse_allocated_irqresource()
                acpi_get_override_irq()
                     mp_find_ioapic()
    Signed-off-by: default avatarPaul Bolle <pebolle@tiscali.nl>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    678301ec
io_apic.c 99.4 KB