Recent GIC v1 patch

Måns Rullgård mans at mansr.com
Fri Sep 18 05:40:27 PDT 2015


Marc Zyngier <marc.zyngier at arm.com> writes:

> On 17/09/15 18:22, Mason wrote:
>> On 17/09/2015 18:33, Marc Zyngier wrote:
>>> Hi Mason,
>>>
>>> On 17/09/15 16:55, Mason wrote:
>>>> Hello Thomas, Marc,
>>>>
>>>> Mans pointed me to a recent patch of yours.
>>>> irqchip/gic: Use IRQD_FORWARDED_TO_VCPU flag
>>>> Get rid of the handler_data abuse.
>>>>
>>>> I'm using a Cortex A9 based SoC. The platform's interrupt
>>>> controller is cascaded into the GIC. I've been trying to
>>>> get this to work for two weeks with no success.
>>>>
>>>> Details can be found here:
>>>> http://thread.gmane.org/gmane.linux.ports.arm.kernel/440327
>>>>
>>>> Do you think your patch my help with my situation?
>>>
>>> Not sure. A GICv1 shouldn't use EOImode==1 at all, so I don't quite see
>>> how you end-up there. Also, you seem to be using 4.2, and this code only
>>> landed during the 4.3 merge window.
>> 
>> Sorry for being unclear. I'm having problems /without/ the patch,
>> and Mans suggested I try the patch.
>
> But that patch will only apply if you run 4.3, because it fixes an issue
> in another patch that only exists in 4.3.

OK, forget I said anything then.  I just saw someone mention it in
connection with a BCM chip and thought it might be related without
digging deeper.  Nobody is paying me to do that.

-- 
Måns Rullgård
mans at mansr.com



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