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

[Paul Menzel]

[+cc Radoslaw, Aleksandr, Piotr]

Am 19.12.20 um 00:07 schrieb Ben Greear:
> On 12/18/20 11:43 AM, Paul Menzel wrote:

>> 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