netdev - Re: [PATCH 2/2] at803x: double check SGMII side autoneg

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Message-ID: <e063a5fd-a1c5-e9ec-1700-21c6974a7cbe@codeaurora.org>
Date:   Tue, 17 Jan 2017 17:32:10 -0600
From:   Timur Tabi <timur@...eaurora.org>
To:     Zefir Kurtisi <zefir.kurtisi@...atec.com>, netdev@...r.kernel.org
Cc:     andrew@...n.ch, f.fainelli@...il.com
Subject: Re: [PATCH 2/2] at803x: double check SGMII side autoneg

On 10/24/2016 05:40 AM, Zefir Kurtisi wrote:
> As a result, if you ever see a warning
> '803x_aneg_done: SGMII link is not ok' you will
> end up having an Ethernet link up but won't get
> any data through. This should not happen, if it
> does, please contact the module maintainer.

I am now seeing this:

ubuntu@...ntu:~$ ifup eth1
ubuntu@...ntu:~$ [  588.687689] 803x_aneg_done: SGMII link is not ok
[  588.694909] qcom-emac QCOM8070:00 eth1: Link is Up - 1Gbps/Full - flow 
control rx/tx
[  588.703985] qcom-emac QCOM8070:00 eth1: Link is Up - 1Gbps/Full - flow 
control rx/tx

ubuntu@...ntu:~$ ping 192.168.3.1
PING 192.168.3.1 (192.168.3.1) 56(84) bytes of data.
64 bytes from 192.168.3.1: icmp_seq=1 ttl=64 time=0.502 ms
64 bytes from 192.168.3.1: icmp_seq=2 ttl=64 time=0.244 ms
64 bytes from 192.168.3.1: icmp_seq=3 ttl=64 time=0.220 ms
^C
--- 192.168.3.1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2107ms
rtt min/avg/max/mdev = 0.220/0.322/0.502/0.127 ms

So I do get the "SGMII link is not ok" message, but my connection is fine.  I 
don't know why the link-up message is displayed twice.  It's only displayed 
once if I use the genphy driver instead of the at803x driver.

I'm going to debug the at803x to see what it does that causes the double 
link-up message.

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