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Date:   Sat, 15 Aug 2020 18:55:56 +0200
From:   Clemens Gruber <>
Cc:     netdev <>,,
        Chris Healy <>,
        David Miller <>, Dave Karr <>
Subject: Re: [PATCH net-next v5] net: ethernet: fec: Replace interrupt driven
 MDIO with polled IO


this patch / commit f166f890c8 ("net: ethernet: fec: Replace interrupt
driven MDIO with polled IO") broke networking on i.MX6Q boards with
Marvell 88E1510 PHYs (Copper / 1000Base-T).

Reverting said commit fixes the problem.

We also reverted 7cdaa4cc4b ("net: ethernet: fec: prevent tx starvation
under high rx load") but that was just for the revert of the problematic
commit to apply cleanly on top of 5.8 / 5.8.1.

Best regards,

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