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Date:   Fri, 29 May 2020 11:03:28 +0200
From:   Petr Machata <>
To:     Andrew Lunn <>
Cc:     Amit Cohen <>, mlxsw <>,
        "netdev\" <>,
        "o.rempel\" <>,
        Michal Kubecek <>
Subject: Re: Link down reasons

Andrew Lunn <> writes:

> It is called downshift. And we have support for it in the phylib core,
> if the PHY has the needed vendor register.

Thanks for the references.

> So in theory we could report:
> Link detected: yes (downshifted)
> Assuming your proposed API support a reason why it is up, not just a
> reason why it is down?

Michal Kubecek <> writes:

> Perhaps we could use more general name than "link down reason", e.g.
> "extended state", and it could be reported even if the link is still up

All right, that makes sense to me. Let's make it extended state.


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