On Tue, Jun 16, 2020 at 08:34:43PM +0800, Macpaul Lin wrote: > Some USB hardware like DMA engine can help to process (split) the data > of each URB request into small packets. For example, the max packet size > of high speed is 512 bytes. These kinds of hardware can help to split > the continue Tx/Rx data requests into packets just at the max packet > size during transmission. Hence upper layer software can reduce some > effort for queueing many requests back and forth for larger data. > > Here we introduce "can_exceed_maxp" flag in gadget when these kinds of > hardware is ready to support these operations.
This isn't needed. All UDC drivers must be able to support requests that are larger than the maxpacket size. Alan Stern
