[PATCH net-next v4] net: stmmac: dwxgmac2: enable L2 split header support

[Sagar Cheluvegowda]

> Agreed. I will send the FD/LD handling in dwxgmac2_get_rx_header_len()
> as a separate patch to net with:
>
> Fixes: 96147375d49f ("net: stmmac: xgmac: Only get SPH header len if available")
>
> and rebase the L2 split header support on top of it for net-next.

Correction on this point: there is no user-visible bug in the current
code, so I won't be sending a net fix. On XGMAC the RX buffers are
sized so that a frame always fits in a single descriptor, so the
FD=1/LD=0 case where L34T is not valid is not hit today.
I will keep the FD/LD handling in v5 to follow the databook's "Header
Length Availability in RDES2" table, without describing it as a fix.


Regards,
Sagar