Hi Benjamin,

On Tue, 23 Jun 2009 12:47:59 +1000, 
Benjamin Herrenschmidt [off-list ref] mentioned: 

Commit 31207dab7d2e63795eb15823947bd2f7025b08e2
"Fix incorrect allocation of interrupt rev-map"
introduced a regression crashing on boot on machines using
a "DCR" based MPIC, such as the Cell blades.

The reason is that the irq host data structure is initialized
much later as a result of that patch, causing our calls to
mpic_map() do be done before we have a host setup.

Unfortunately, this breaks _mpic_map_dcr() which uses the
mpic->irqhost to get to the device node.

This fixes it by, instead, passing the device node explicitely
to mpic_map().

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

 arch/powerpc/sysdev/mpic.c |   29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

I confirmed that the boot failure on IBM Cell Blades QS21/22 are fixed 
with this patch.

Acked-by: Akira Tsukamoto <redacted>

-- 
Akira Tsukamoto
Sony Computer Entertainment Inc. 
Architecture Lab.
Japan