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

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Message-ID: <CAN0jFd2Sa0ba7vewLex6x3MAjsH3LtNrgMdL-xVLFjLcp8_XEA@mail.gmail.com>
Date: Fri, 9 Aug 2024 14:04:21 -0700
From: Daiwei Li <daiweili@...il.com>
To: Vinicius Costa Gomes <vinicius.gomes@...el.com>
Cc: anthony.l.nguyen@...el.com, davem@...emloft.net, edumazet@...gle.com, 
	intel-wired-lan@...ts.osuosl.org, jeffrey.t.kirsher@...el.com, 
	jesse.brandeburg@...el.com, kuba@...nel.org, kurt@...utronix.de, 
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, 
	richardcochran@...il.com, sasha.neftin@...el.com
Subject: Re: [Intel-wired-lan] [iwl-net v2 2/2] igb: Fix missing time sync events

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

Excellent, thank you!


On Fri, Aug 9, 2024 at 9:39 AM Vinicius Costa Gomes
<vinicius.gomes@...el.com> wrote:
>
> Daiwei Li <daiweili@...il.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