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

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Message-ID: <3b0cca7f-bffe-0717-fbea-7d9ba47a858f@ti.com>
Date:   Thu, 20 Apr 2017 12:21:10 +0300
From:   Roger Quadros <rogerq@...com>
To:     Alexander Kochetkov <al.kochet@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <andrew@...n.ch>, <nsekhar@...com>, <kyle.roeschley@...com>
Subject: Re: [PATCH] net: phy: fix auto-negotiation stall due to unavailable
 interrupt

Hi,

On 19/04/17 19:53, Alexander Kochetkov wrote:
> 
>> 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?

This patch fixes my problem and doesn't have the 1 second delay that my patch had.

So,

Tested-by: Roger Quadros <rogerq@...com>

> 
> 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():

Our MAC driver is using phy_start() and I didn't face any issues with your patch.

> 
> 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.
> 

cheers,
-roger