netdev - RE: [PATCH v2 1/1] net: phy: micrel: Add workaround for incomplete autonegotiation

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Message-ID:
 <CH2PR12MB38952DAF6D1BD4CE6831EED1D79EA@CH2PR12MB3895.namprd12.prod.outlook.com>
Date: Thu, 28 Dec 2023 13:37:21 +0000
From: Asmaa Mnebhi <asmaa@...dia.com>
To: Florian Fainelli <f.fainelli@...il.com>, "davem@...emloft.net"
	<davem@...emloft.net>, "marek.mojik@....cz" <marek.mojik@....cz>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: David Thompson <davthompson@...dia.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 1/1] net: phy: micrel: Add workaround for incomplete
 autonegotiation

 > On 12/28/2023 12:16 AM, Asmaa Mnebhi wrote:
> > Very rarely, the KSZ9031 fails to complete autonegotiation although it
> > was initiated via phy_start(). As a result, the link stays down.
> > Restarting autonegotiation when in this state solves the issue.
> >
> > Signed-off-by: Asmaa Mnebhi <asmaa@...dia.com>
> 
> Is there a Micrel errata associated with this work around that could be
> referenced here?

Hi Florian,

No there isn’t. This is based on observations and comparison with the behavior and testing of other PHYs. For example, we don’t see this issue with the Vitesse PHY.

Thanks.
Asmaa