linux-kernel - Re: [RFC] net: phy: smsc: Disable auto-negotiation on startup

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Date:   Wed, 12 Oct 2016 02:13:06 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Kyle Roeschley <kyle.roeschley@...com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andrew Lunn <andrew@...n.ch>
Subject: Re: [RFC] net: phy: smsc: Disable auto-negotiation on startup

On 10/10/2016 10:41 AM, Kyle Roeschley wrote:
> Because the SMSC PHY completes auto-negotiation before the driver is
> ready to handle interrupts, the PHY state machine never realizes that we
> have a link. Clear the ANENABLE bit on initialization, which lets
> genphy_config_aneg do its thing when that code is hit later.
> 
> While this patch does fix the problem we see (no link on boot without
> re-plugging the cable), it seems like the generic PHY code should be
> able to handle auto-negotiation completing before interrupts are
> enabled. Submitted as an RFC in the hopes that someone has an idea as to
> how that could be done.
> 
> This fix is copied from commit 99f81afc139c ("phy: micrel: Disable auto
> negotiation on startup").

Do you mind trying:

https://www.spinics.net/lists/netdev/msg397857.html

and see if you do get link interrupts without your patch applied? Thanks!
-- 
Florian