mv643xx_eth and MDIO bus PM resume

[Simon Guinot]

Hi,

I am trying to get some PM support for Kirkwood machines and I have to
deal with the MDIO bus driver which trigger a kernel crash at resume.

The Kirkwood SoC Ethernet driver is mv643xx_eth and don't use the PAL
machine state. The PHY is handled by calling manually PHY functions.

The problem is that the current mdio_bus_resume() implementation
_always_ start at resume the PAL state machine even if the driver can't
handle that. That's the mv643xx_eth case, which don't provide the
adjust_link() method.

Any hint to fix this issue is welcome.

Thanks in advance.

Simon
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