netdev - Re: Marvell phy errata origins?

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Message-ID: <CAFcVEC+PW1Vv5SdmzHbDe=gffJKY3tTXYdW1G8-kopsRTZ91FQ@mail.gmail.com>
Date:   Tue, 25 Sep 2018 23:00:31 +0530
From:   Harini Katakam <harinik@...inx.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     danielwa@...co.com, Florian Fainelli <f.fainelli@...il.com>,
        afleming@...escale.com, Harini Katakam <harini.katakam@...inx.com>,
        netdev@...r.kernel.org, hramdasi@...co.com, jpitti@...co.com,
        gcasheek@...co.com
Subject: Re: Marvell phy errata origins?

Hi Daniel,

On Tue, Sep 25, 2018 at 9:10 PM Andrew Lunn <andrew@...n.ch> wrote:
>
> > I hope this this thread isn't too old to bring back to life. So it seems
> > that Harini found that m88e1111 did not need this errata, and Cisco
> > previously found that Harini's patch fixed m88e1112, we included it
> > internally for that reason
> >
> > Now I'm getting reports that this errata fixes issues we're seeing on
> > m88e1111. We see an interrupt storm without the errata, despite the errata
> > not being defined in the datasheet.
>
> Is everybody actually using interrupts? It could be in one system
> phylib is polling.
>

Yes, we weren't using interrupts; we used phy poll.

As I recall, the register and page combination was reserved and
the access seemed to fail.
It will be useful if we can the errata description or version details.
I'll check if I can get any more information.

Regards,
Harini