wanted_features in cxgb3 driver

Hello,
A question:
I saw two assignment to dev->wanted_features in cxgb_extension_ioctl() in
drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c.

This is the only driver which sets wanted_features of netdevice (in
net-next tree).

Is there some special reason for that ?  or is it some legacy matter ?


According to Documentation/networking/netdev-features.txt,
....
netdev->wanted_features set contains feature set requested by user.
...    This set is internal to networking core and should not be
referenced in drivers.
...

rgs,
Kevin