On 29 July 2016 at 09:09, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:
> On 29 July 2016 at 03:23, Heyi Guo <heyi.guo@linaro.org> wrote:
>> In timer interrupt handler, we can see the comment that "Signal end of
>> interrupt early to help avoid losing subsequent ticks from long duration
>> handlers".
>>
>> So, if we want to fix this, shall we remove EOIR writing in GIC IRQ handler
>> (move it to unregistered interrupt branch only) and keep the one in timer
>> interrupt handler, and declare that EOIR should be taken care by each
>> interrupt handler itself, rather than by GIC driver?
>>
>
> Can we use priority drop instead?

Reply to self: probably not. I suppose the whole point is to allow
nested timer interrupts.

In any case, we need to get rid of the double EOIR write. I would
prefer not to change the contract with existing interrupt handlers,
though.