83xx: requesting external interrupts

[Kumar Gala]

On May 11, 2007, at 3:29 PM, Ben Warren wrote:

> On Fri, 2007-05-11 at 15:15 -0500, Kumar Gala wrote:
>
>>
>> I assume you're code doesn't look exactly like this.  You'll need to
>> use the virq in the request_irq()... its most likely just random luck
>> if things are working and you aren't using the virq returned from
>> irq_create_mapping()
>>
>> (Well its more than random luck, its because most 83xx systems only
>> have one PIC and this hw_irq # == virq)
>>
>> - k
>
> In the code that registers the ISR I do this:
>
> virq = irq_find_mapping(NULL, MY_IRQ);
> request_irq(virq ...)
>
> Since I only have one interrupt controller, host is NULL, right?

Should be ok.  I've been doing the irq_create_mapping() in _init_IRQ 
() and saving off the return.

- k