[Intel-wired-lan] 5.10.0 kernel regression for 2.5Gbps link negotiation?

[Ben Greear]

On 12/18/20 11:43 AM, Paul Menzel wrote:
> Dear Todd,
> 
> 
> Am 18.12.20 um 20:27 schrieb Fujinaka, Todd:
>> Yes, and I'm plugging the hole in the README right now. Here's the proposed text:
>>
>> Advertisements for 2.5G and 5G on the x550 were turned off by default due to
>> interoperability issues with certain switches. To turn them back on, use
>>
>> ethtool -s <ethX> advertise N
>>
>> where N is a combination of the following.
>>
>> 100baseTFull    0x008
>> 1000baseTFull   0x020
>> 2500baseTFull   0x800000000000
>> 5000baseTFull   0x1000000000000
>> 10000baseTFull  0x1000
>>
>> For example, to turn on all modes:
>> ethtool -s <ethX> advertise 0x1800000001028
>>
>> For more details please see the ethtool man page.
> 
> What commit introduced this regression. Please bear in mind, that this contradicts Linux’ no-regression policy, and the commit should therefore be reverted as 
> soon as possible.

Looks like it is at the end of this patch, though the description doesn't
mention changing defaults:

Commit a296d665eae1e8ec6445683bfb999c884058426a
Author: Radoslaw Tyl <radoslawx.tyl at intel.com>
Date:   Fri Jun 26 15:28:14 2020 +0200

     ixgbe: Add ethtool support to enable 2.5 and 5.0 Gbps support

     Added full support for new version Ethtool API. New API allow use
     2500Gbase-T and 5000base-T supported and advertised link speed modes.

     Signed-off-by: Radoslaw Tyl <radoslawx.tyl at intel.com>
     Tested-by: Andrew Bowers <andrewx.bowers at intel.com>
     Signed-off-by: Tony Nguyen <anthony.l.nguyen at intel.com>

Thanks,
Ben

> 
> 
> Kind regards,
> 
> Paul
> 


-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com