[PATCH V2 05/19] irqchip: crossbar: Change allocation logic by reversing search for free irqs
r.sricharan at ti.com
Thu Jun 12 23:09:39 PDT 2014
On Thursday 12 June 2014 06:26 PM, Jason Cooper wrote:
> On Thu, Jun 12, 2014 at 05:23:13PM +0530, Sricharan R wrote:
>> From: Nishanth Menon <nm at ti.com>
>> Reverse the search algorithm to ensure that address mapping and IRQ
>> allocation logics are proper. This can open up new bugs which are
>> easily fixable rather than wait till allocation logic approaches
>> the limit to find new bugs.
> Could you expand on this logic some more? What class of bugs are you
> hoping to discover more easily?
class 1. address space errors -> example:
reg = <a size_b>
ti,max-irqs = is a wrong parameter
class 2: irq-reserved list - which decides which entries in the
address space is not actually wired in
class 3: wrong list of routable-irqs.
in general allocating from max to min tends to have benefits in
ensuring the different issues that may be present in dts is easily
caught at definition time, rather than at a later point in time.
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