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

From: Vinicius Costa Gomes <[email-masked]>
Date: Fri, 09 Aug 2024 09:38:58 -0700

Daiwei Li <[email-masked]> 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/[email-masked]/ 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