MPIC cleanup series

[Kyle Moffett]

On Sun, Nov 27, 2011 at 18:51, Benjamin Herrenschmidt
<benh at kernel.crashing.org> wrote:
> Overall I really look your series. It doesn't quite apply cleanly
> anymore so I'll as you for a new shoot after you address the comments
> below, at which point, if you're fast enough, I'll stick it in -next :-)

Awesome! Thanks!

As I mentioned before, I have precious little of the hardware to test
this all on, so I hope I don't break anything.  At minimum I need to
do a final build-and-run test on my e500 boards before I send it out.
:-D


> Just a couple of comments on some of the patches:
>
>  - 5/10: search for open-pic device-tree node if NULL
>
> The idea is fine, however most callers ignore the device-type and only
> compare on compatible, while you replace that with a match entry that
> seems to require matching on both. This is likely to break stuff. The
> "type" part of te march entry should be NULL I believe.

If you re-read that, the match table used if no of_node is passed in
has *two* separate entries, one of them with a "type" and the other
with a "compatible", as opposed to a single entry which matches both
"type" and "compatible".

There are a lot of callers which do:
  dnp = of_find_node_by_type(NULL, "open-pic");

So I doubt I can remove the "type" entry all together, unfortunately.


>  - 9/10: cache the node
>
> of_node_get() is your friend.

Yes, I actually messed this one up in the prior patch too, thanks for
noticing.  It should all be fixed now.


>  - 10/10: Makes me a bit nervous. It 'looks' right but I wouldn't bet on
> Apple device-trees being sane vs. chaining. I would like a test that
> doesn't do the cascade if the mpic is a primary to at least limit the
> risk of messup.

Oh, you mean to wrap that block like this?

if (mpic->flags & MPIC_SECONDARY) {
  virq = irq_of_parse_and_map(mpic->node, 0);
  ...
}

Sure, makes sense to me.  I've made that change.

Thanks for the review!

Cheers,
Kyle Moffett

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