ke sure the DMA is not started 
before we know the last desc->die_dt = {DT_FSTART,DT_FSINGLE} have would 
be visible?

The usefulness of that I can imagine. As if the DMA engine is not 
running and we start it and that write is not visible we could delay 
sending until the doorbell is rang again.
-- 
Kind Regards,
Niklas Söderlund[PATCH 3/3] net: ravb: Enforce descriptor type ordering to prevent early DMA start"niklas.soderlund" <niklas.soderlund@ragnatech.se> undefinedFabrizio Castro <fabrizio.castro.jz@renesas.com> undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined�4��`