> Do you mean report supported range via extack?
Yes.
811ac400ea33 ("net: phy: dp83869: Add speed optimization feature")
was merged recently. It has:
+ default:
+ phydev_err(phydev,
+ "Downshift count must be 1, 2, 4 or 8\n");
+ return -EINVAL;
and there are more examples in PHY drivers where it would be good to
tell the uses what the valid values are. I guess most won't see this
kernel message, but if netlink ethtool printed:
Invalid Argument: Downshift count must be 1, 2, 4 or 8
it would be a lot more user friendly.
Andrew
