From: David Laight <david.lai...@aculab.com>
Date: Mon, 30 Jan 2017 14:00:28 +0000

> From: Tariq Toukan
>> Sent: 29 January 2017 16:56
>> From: Ariel Levkovich <lar...@mellanox.com>
>> 
>> This feature will allow the user to disable auto negotiation
>> on the port for mlx4 devices while setting the speed is limited
>> to 1GbE speeds.
>> Other speeds will not be accepted in autoneg off mode.
> 
> What is the rationale behind this change?

Because it's an ethtool user feature we've had to two decades
and it allows the user greater control over the link state.

> When I was writing ethernet drivers it was always better to
> leave autonegotiation enabled with restricted modes than to
> fix the speed.

Nothing about this change effects this.  The user is just given
the ability to turn autonegotiation off if they wish to do so.

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