netdev - Re: [PATCH] net: phy: fix auto-negotiation stall due to unavailable interrupt

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Message-Id: <EA84802B-82E6-4485-A92E-E2751A84D4D0@gmail.com>
Date:   Wed, 19 Apr 2017 19:53:24 +0300
From:   Alexander Kochetkov <al.kochet@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        andrew@...n.ch, Roger Quadros <rogerq@...com>, nsekhar@...com,
        kyle.roeschley@...com
Subject: Re: [PATCH] net: phy: fix auto-negotiation stall due to unavailable interrupt

> 19 апр. 2017 г., в 19:32, Florian Fainelli <f.fainelli@...il.com> написал(а):
> 
> http://patchwork.ozlabs.org/patch/743773/
> 
> Roger can you also test Alexander's patch?

If MAC use phy_start_aneg() instead of phy_start() my patch will not work as
expected. Roger, if patch don’t work for you please check what MAC bring up PHY using
phy_start():

http://patchwork.ozlabs.org/patch/752308/

Is it correct to start PHY inside MAC probe using phy_start_aneg()? Or phy_start() must be used?

And probably this tags should be added for my patch:
Fixes: 3c293f4e08b5 ("net: phy: Trigger state machine on state change and not polling.")
Cc: stable <stable@...r.kernel.org> # v4.9+

Because I bisected to commit 529ed1275263 ("net: phy: phy drivers
should not set SUPPORTED_[Asym_]Pause») that looks pretty good.

Also, there is another issue I found. link_timeout doesn’t work for interrupt driven PHY.
It is possible to implement timer to handle this case.
Florian, what do you think? Should this be fixed?

Alexander.