>> /* By default isa irqs are identity mapped to gsis */
>> unsigned int isa_irq_to_gsi[16] = {
>> 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
>> };
>>
>> unsigned int gsi_to_irq(unsigned int gsi)
>> {
>> unsigned int irq = gsi + 16;
>> unsigned int i;
>> for (i = 0; i < 16; i++) {
>> if (isa_irq_to_gsi[i] == gsi)
>> irq = i;
>> }
>> return irq;
>> }
I just realized that we already have this function in
arch/x86/kernel/acpi/boot.c and arch/ia64/kernel/acpi.c it is called:
acpi_gsi_to_irq()
We still need this implementation but it will get really confusing if
we have two functions with the same name trying to do the same job.
I am relieved to see this because this should mean we shouldn't have
many hard fixed assumptions that irq == gsi.
This does mean though that your patch has a real bug in it because
you have not updated acpi_gsi_to_irq.
Eric
>> unsigned int irq_to_gsi(unsigned int irq)
>> {
>> unsigned int gsi;
>> if (irq < 16) {
>> gsi = isa_irq_to_gsi[irq];
>> } else {
>> gsi = irq - 16;
>> }
>> return gsi;
>> }
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