[PATCH v5 06/27] irq_domain/powerpc: eliminate irq_map; use irq_alloc_desc() instead

Benjamin Herrenschmidt
2012-04-02T04:21:57Z

On Sun, 2012-04-01 at 23:27 +0200, Andreas Schwab wrote:
> Grant Likely <grant.likely@secretlab.ca> writes:
>
> > This patch drops the powerpc-specific irq_map table and replaces it with
> > directly using the irq_alloc_desc()/irq_free_desc() interfaces for allocating
> > and freeing irq_desc structures.
>
> This breaks irqs on PowerMac G5. I see lost irq errors from the sata
> driver.
>
> Note that the breakage only started after the series was merged into
> mainline. But when transplanted upon the parent of the merge this is
> the commit that was blamed by bisect. So something changed between
> v3.3-rc3 and the merge of this series that broke it.

can you tell me more ? (What machine precisely, what .config etc...) ?

I tested here on two G5's:

- PowerMac7,3 aka Dual G5 AGP. This ones has U3 + K2 and
uses cascaded MPICs

- PowerMac11,2 aka Quad G5. This one has U4 + K2 and uses a single MPIC
in the northbridge

And both appear to work fine with today upstream (basically -rc1).

Cheers,
Ben.