linux-kernel - Re: [PATCH] net: phy: micrel: add Asym Pause workaround for KSZ9021

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Message-ID: <20190926120922.GD1864@lunn.ch>
Date:   Thu, 26 Sep 2019 14:09:22 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Hans Andersson <haan@...lavision.se>
Cc:     f.fainelli@...il.com, hkallweit1@...il.com, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        antoine.tenart@...tlin.com,
        Hans Andersson <hans.andersson@...lavision.se>
Subject: Re: [PATCH] net: phy: micrel: add Asym Pause workaround for KSZ9021

On Thu, Sep 26, 2019 at 09:54:37AM +0200, Hans Andersson wrote:
> From: Hans Andersson <hans.andersson@...lavision.se>
> 
> The Micrel KSZ9031 PHY may fail to establish a link when the Asymmetric
> Pause capability is set. This issue is described in a Silicon Errata
> (DS80000691D or DS80000692D), which advises to always disable the
> capability.
> 
> Micrel KSZ9021 has no errata, but has the same issue with Asymmetric Pause.
> This patch apply the same workaround as the one for KSZ9031.
> 
> Signed-off-by: Hans Andersson <hans.andersson@...lavision.se>

Fixes: 3aed3e2a143c ("net: phy: micrel: add Asym Pause workaround")

This is not the best fixes: tag, since it was not that change which
broke it. But going further back will be hard.

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew