[PATCH 3/4] powerpc/mpic: Move internal interrupt source vector allocation to a separate function.

[Kumar Gala]

On Mar 27, 2012, at 8:52 AM, Sethi Varun-B16395 wrote:

> 
> 
>> -----Original Message-----
>> From: Kumar Gala [mailto:galak at kernel.crashing.org]
>> Sent: Tuesday, March 27, 2012 6:55 PM
>> To: Sethi Varun-B16395
>> Cc: Linuxppc-dev at lists.ozlabs.org
>> Subject: Re: [PATCH 3/4] powerpc/mpic: Move internal interrupt source
>> vector allocation to a separate function.
>> 
>> 
>> On Mar 27, 2012, at 7:16 AM, Varun Sethi wrote:
>> 
>>> Allocate vector numbers for MPIC internal interrupt sources (IPIs and
>>> Timers) in a separate function.
>>> 
>> 
>> Explain why you are making this change.
> 
> 
> [Sethi Varun-B16395] With the current code it becomes fairly difficult to
> add new internal interrupt sources. In my case I had to add 32 additional
> interrupt sources corresponding to the MPIC error interrupts. It's more
> convenient doing the internal interrupt source allocation using a loop.

I think that is more due to how you added the MPIC error interrupts and issues w/that code.  If you are treating the MPIC error interrupts as a cascade than they should have a distinct linux IRQ space from the standard MPIC interrupts.  This is how the MSIs work (as an example).

- k