On Mon, Jun 18, 2012 at 04:19:44PM +0800, Dong Aisheng wrote:

Hmm, i'm wondering it may not make too much sense to alloc_descs without
using irqdomain since the allocated irqs are all virtual irqs.

It still makes much sense, because we are killing all those static
IRQ_START definitions here, so we need to get irq_base by calling
alloc_descs anyway.

Using private mapping is not recommended.
Maybe we can do it together with this patch since irqdomain support
does not depend on device tree.
What do you think?

At this point, I would be conservative on that, since I do not have
the setup to test all the IPU irq handling.

-- 
Regards,
Shawn