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

On Sun, 2012-04-01 at 23:27 +0200, Andreas Schwab wrote:

Grant Likely [off-list ref] writes:

quoted

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.