On Fri, Dec 18, 2020 at 08:41:02PM +0000, Mark Brown wrote: > On Sat, Dec 19, 2020 at 12:49:38AM +0530, Pratyush Yadav wrote: > > Anyway, if the SPI maintainers think this is worth it, I won't object. > This gets kind of circular, for me it's a question of if there's some > meaningful benefit from using the feature vs the cost to support it and > from the sounds of it we don't have numbers on the benefits from using > it at present. ...although I do have to say looking at the implementation that the cost seems low, it's just a flag set on an existing transfer. The only issue is if we'd get more win from coalesing the entire transaction (or entire transmit) into a single transfer that could be DMAed and/or requires fewer trips through the stack which does make it seem like an unclear tradeoff from the point of view of client drivers
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