ethtool occationally fails to communicate with with ucc_geth

[Lennart Sorensen]

On Wed, Feb 06, 2013 at 09:08:32PM +0000, Ben Hutchings wrote:
> This seems to be a workaround for a bug in phylib: phy_state_machine()
> calls netif_carrier_on() before adjust_link(), so the TX scheduler can
> start immediately even though the MAC has not been configured.
> 
> A better workaround would be to use netif_carrier_{off,on}() in
> ugeth_{quiesce,activate}() respectively instead of
> netif_device_{detach,attach}().  But I think phylib really ought to be
> fixed.

I am willing to try things, but this is certainly in parts of the network
stack I don't normally poke around in and hence don't know how works.

I just managed to track it down this far. :)

I can try the carrier_off/on in place of the detach/attach and see if
it works.

-- 
Len Sorensen
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