On Mon, 26 Sep 2022 19:57:33 +0100 ecree@xilinx.com wrote:

TC offload support will involve complex limitations on what matches and
 actions a rule can do, in some cases potentially depending on rules
 already offloaded.  So add an ethtool private flag "log-tc-errors" which
 controls reporting the reasons for un-offloadable TC rules at NETIF_INFO.

Because extack does not work somehow?

Somehow you limitations are harder to debug that everyone else's so you
need a private flag? :/