The "no partial packets in the middle of an sglist" policy belongs to usb-storage..
Does it really? It seems to me that anyone doing a bulk transfer using an s-g list would want to make it look like a single stream, i.e., no short packets in the middle. That's built into the USB standard: a short packet signals the end of a transfer.
Clearly not "anyone". Some of my standard HCD regression tests would break with those semantics ... those were running (reliably!) before usb-storage switched.
I don't view a scatterlist as a single transfer; it's just a shorthand
for a bunch of transfers that all need to execute in a given order.
That's certainly its structure: N * { address, count } doesn't say
anything about such policies.- Dave
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