> This does not seem like the right direction to me.
>
> The "Detected Hardware Unit Hang" print does not indicate that the interface
> is dead, but that the transmitter is stalled.
>
> This can be due to an unusually high load, or a HW fault / race condition
> with another component, etc.
>
> When a hang is detected, the transmitter is stopped with netif_stop_queue()
> and eventually ndo_tx_timeout triggers a full reset to the device, which in
> many cases recovers it from the hang.
Does a full reset cause the link to be negotiated again? If so, there
is no harm in setting the carrier down. If the reset is successful,
the carrier will be restored. However, if the reset does not recover
the system, does the carrier say down?
Andrew
