[openib-general] Dropping NETIF_F_SG since no checksum feature.

[Roland Dreier]

    Michael> Maybe I can patch linux to allow SG without checksum?
    Michael> Dave, maybe you could drop a hint or two on whether this
    Michael> is worthwhile and what are the issues that need
    Michael> addressing to make this work?

What do you really gain by allowing SG without checksum?  Someone has
to do the checksum anyway, so I don't see that much difference between
doing it in the networking core before passing the data to/from the
driver, or down in the driver itself.

 - R.