USB transfers in device drivers

[Hans Petter Selasky]

On 2019-05-01 10:34, O'Connor, Daniel wrote:
> I don't have a solid hypothesis for the failures as yes but one thing I'd like to make sure is that the USB stack is keeping the USB hardware busy with pending requests - does anyone know if the USB FIFO code does that automatically?

Only the XHCI driver supports HW based double buffering of BULK transfers.

I suppose you are using BULK. Else you will need to use ISOCHRONOUS 
transfers.

--HPS