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SubjectRe: [regression v4.11] 617f01211baf ("8139too: use napi_complete_done()")
David Miller <davem@davemloft.net> :
[...]
> 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.

--
Ueimor

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