linux-kernel - Re: i.MX28 based system losing eth0 on boot

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Message-ID: <CAOMZO5C4GiLu3sGPxuEDX+cVOvXsk=z9iqLSvZX8HzpncJuJOw@mail.gmail.com>
Date:	Wed, 7 May 2014 00:17:07 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Brian Lilly <brian@...stalfontz.com>
Cc:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	"David S. Miller" <davem@...emloft.net>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Jim Baxter <jim_baxter@...tor.com>,
	Frank Li <Frank.Li@...escale.com>,
	Fugang Duan <B38611@...escale.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: i.MX28 based system losing eth0 on boot

Brian,

On Tue, May 6, 2014 at 1:44 PM, Brian Lilly <brian@...stalfontz.com> wrote:
> Uwe:
>
> With commit a264b981f2c76e281ef27e7232774bf6c54ec865 we're having eth0
> come up, then brought right back down with an MDIO rx timeout moments
> after.  Adding back in the removed code keeps the interface alive and
> it's working afterward without trouble.  I've tested the re-inserted
> code in 3.12, 3.14 without issue on our boards.
>
> Is there something else that can be done to prevent the MDIO timeouts?
> We are using basically the same schematic for networking as the
> imx28evk.
>
> Any thoughts on how to resolve this?

Could you try the latest Russell's FEC patches available at?
 http://ftp.arm.linux.org.uk/cgit/linux-arm.git/log/?h=fec-testing

In particular this one could help with your "MDIO timeout" issue:
http://ftp.arm.linux.org.uk/cgit/linux-arm.git/commit/?h=fec-testing&id=ec1fac3de70b16c69d3edc9f223e91d56b1915de
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