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Date:	Wed, 7 May 2014 00:17:07 -0300
From:	Fabio Estevam <>
To:	Brian Lilly <>
Cc:	Uwe Kleine-König 
	"David S. Miller" <>,
	Fabio Estevam <>,
	Jim Baxter <>,
	Frank Li <>,
	Fugang Duan <>,
	"" <>,
	linux-kernel <>
Subject: Re: i.MX28 based system losing eth0 on boot


On Tue, May 6, 2014 at 1:44 PM, Brian Lilly <> 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?

In particular this one could help with your "MDIO timeout" issue:
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