[LEDE-DEV] Transmit timeouts with mtk_eth_soc and MT7621

[John Crispin]

Hi All,

i have a staged commit on my laptop that makes all the (upstream) 
ethernet fixes that i pushed to mt7623 work on mt7621. please hang on 
for a few more days till i finished testing the support. this will add 
latest upstream ethernet support + DSA

     John


On 19/08/17 17:06, Mingyu Li wrote:
> Hi Kristian.
>
> does this patch works?
>
> 2017-07-24 23:45 GMT+08:00 Mingyu Li <igvtee at gmail.com>:
>> i guess more other interrupts maybe cause the problem. because the
>> ethernet receive flow is interrupt by other hardware. so use sd card,
>> wifi or usb can generate interrupts.
>>
>> 2017-07-24 17:19 GMT+08:00 Kristian Evensen <kristian.evensen at gmail.com>:
>>> Hi,
>>>
>>> On Mon, Jul 24, 2017 at 4:02 AM, Mingyu Li <igvtee at gmail.com> wrote:
>>>> i guest the problem is there are some tx data not free. but tx
>>>> interrupt is clean. cause tx timeout. the old code will free data
>>>> first then clean interrupt. but there maybe new data arrive after free
>>>> data before clean interrupt.
>>>> so change it to clean interrupt first then clean all tx data( also
>>>> remove the budget limit). if new tx data arrive. hardware will set tx
>>>> interrupt flag. then we will free it next time.
>>>> i also apply this to rx flow.
>>> Thanks for the detailed explanation. I have deployed an image with the
>>> patch to some of the routers showing this issue, so lets wait and see.
>>> Of course, all routers have been stable for the last couple of days
>>> (including before the weekend) now, so I will let them run for a week
>>> or so and then report back.
>>>
>>> In order to ease testing and make it more controlled, do you have any
>>> suggestions for how to trigger the error? Is it "just" a timing issue
>>> or should I be able to trigger it with for example a specific traffic
>>> pattern?
>>>
>>> -Kristian
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