Re: [regression v4.11] 617f01211baf ("8139too: use napi_complete_done()")

[Eric Dumazet]

On Mon, Apr 10, 2017 at 7:22 AM, tedheadster <tedheadster@xxxxxxxxx> wrote:
> On Sat, Apr 8, 2017 at 6:23 AM, Francois Romieu <romieu@xxxxxxxxxxxxx> wrote:
>> David Miller <davem@xxxxxxxxxxxxx> :
>> [...]
>>> One theory is that the interrupt masking isn't working properly
>>> and interrupts are still arriving and hitting the NAPI state even
>>> when we are actively polling NAPI.
>>>
>>> And this problem was masked by the locking done here.
>>
>> Yes.
>>
>> Ville, can you rule out irq sharing between the 8139 and some other
>> device ? It's a candidate for unexpected interrupt handler invocation
>> with older pc, even with properly working hardware.
>>
>
> Eric,
>   If napi_complete_done() calls could affect drivers on older
> hardware, I can test the following:
>
> drivers/net/ethernet/3com/typhoon.c
> drivers/net/ethernet/amd/pcnet32.c
> drivers/net/ethernet/broadcom/tg3.c
> drivers/net/ethernet/dec/tulip/interrupt.c
> drivers/net/ethernet/intel/e100.c
> drivers/net/ethernet/intel/e1000/e1000_main.c
> drivers/net/ethernet/smsc/epic100.c
> drivers/net/ethernet/via/via-rhine.c

That would be great, thanks Matthew.