Re: ATH9 driver issues on ARM64

Marc Zyngier
2016-12-09T10:50:44Z

On 09/12/16 02:07, Bharat Kumar Gogada wrote:
>> On 08/12/16 18:33, Bharat Kumar Gogada wrote:
>>>> On 08/12/16 15:29, Bharat Kumar Gogada wrote:
>>>>> 218: 61 0 0 0 GICv2 81 Level mmc0
>>>>> 219: 0 0 0 0 GICv2 187 Level arm-smmu global fault
>>>>> 220: 471 0 0 0 GICv2 53 Level xuartps
>>>>> 223: 0 0 0 0 GICv2 154 Level fd4c0000.dma
>>>>> 224: 3 0 0 0 dummy 1 Edge ath9k
>>>>
>>>> What is this "dummy" controller? And if that's supposed to be a
>>>> legacy interrupt from the PCI device, it has the wrong trigger.
>>>
>>> Yes it is for legacy interrupt, wrong trigger means ?
>>
>> Aren't legacy interrupts supposed to be *level* triggered, and not edge?
>>
> Yes agreed.
> For legacy interrupts im using irq_set_chained_handler_and_data so the irq line between bridge and GIC
> Will not be shown here. The above how is virq for legacy, which is given by kernel, not sure why its state is set
> to edge.

Well, you should try and find out. Edge triggering for legacy interrupts
is a real bug, and I don't think it has anything to do with arm64
(despite what the subject says).

Thanks,

M.
--
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