Currently we use the "retry" method to issue START_TRANSFER command multiple times, each with a next interval. There's been report that 5 number of retries may not be enough. See https://lkml.org/lkml/2019/11/11/535 We could increase the number of retries. However, that also may not be enough depending on different system latency. It is not often that the latency is higher than 5 isoc intervals. If it goes beyond 5 intervals, let's restart the whole process again. Changes in v2: - Include patch "usb: dwc3: gadget: WARN on no-resource status" to this series Thinh Nguyen (4): usb: dwc3: gadget: Properly handle failed kick_transfer usb: dwc3: gadget: Store resource index of start cmd usb: dwc3: gadget: Issue END_TRANSFER to retry isoc transfer usb: dwc3: gadget: WARN on no-resource status drivers/usb/dwc3/gadget.c | 71 +++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 59 insertions(+), 12 deletions(-) -- 2.11.0
