[Intel-wired-lan] [iwl-net v2 2/2] igb: Fix missing time sync events

[Vinicius Costa Gomes]

Daiwei Li <daiweili at gmail.com> writes:

> Hi,
>
> It appears this change breaks PTP on the 82580 controller, as ptp4l reports:
>
>> timed out while polling for tx timestamp increasing tx_timestamp_timeout or
>> increasing kworker priority may correct this issue, but a driver bug likely
>> causes it
>
> The 82580 controller has a hardware bug in which reading TSICR doesn't clear
> it. See this thread
> https://lore.kernel.org/all/CDCB8BE0.1EC2C%25matthew.vick@intel.com/ where the
> bug was confirmed by an Intel employee. Any chance we could add back the ack
> for 82580 specifically? Thanks!

Of course, I'll prepare a patch for that. 

Thanks for digging that one up.


Cheers,
-- 
Vinicius