[PATCH net-next 2/2] net: stmmac: disable TX checksum offload for jumbo frames on bugged cores

[Andrew Lunn]

> > Here I want to query a generic rule from netdev maintainers:
> > can XDP frame enable HW checksum on dwmac IP? Per my understanding, the
> > dwmac can only do HW checksum for normal particular packets layouts, such as
> > TCP, UDP. What about if XDP transmits a non-IP frame?
> 
> or a generic XDP guide from netdev maintainers:
> Since XDP can tranmist arbitrary Eth frames, so how does the eth driver cope
> with HW checksum if the HW checksum is intended for supported IP packet
> layouts rather than arbitrary layer2 frames?
> 
> choices:
> c1. Simply disabled HW checksum by default. Then XDP prog must provide
> checksums themselves, lost the HW offload cap for IP packets.
> 
> c2. detect the frame in eth driver's xdp code path, then enable/disable
> HW checksum accordingly. Then how? Any example in exisiting eth drivers
> is appreciated.

Why is this specific to XDP? Cannot the network stack transmit
arbitrary layer2 frames? Isn't this a generic problem?

	  Andrew