On Wed, Jun 24, 2020 at 07:43:44PM +0000, Thinh Nguyen wrote:
Hi, Michael Grzeschik wrote:When we have nothing left to be queued after handling the last trb we have to stop the current transfer. This way we can ensure that the next request will be queued with an new and valid timestamp and will not directly run into an missed xfer. Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx> --- v1 -> v2: - This Patch replaces the following patch by Michael Olbrich: usb: dwc3: gadget: restart the transfer if a isoc request is queued too late drivers/usb/dwc3/gadget.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 0962ddd7fbf6ae6..b2b8b911ac79b39 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2729,7 +2729,10 @@ static bool dwc3_gadget_endpoint_trbs_complete(struct dwc3_ep *dep, if (dep->flags & DWC3_EP_END_TRANSFER_PENDING) goto out; - if (status == -EXDEV && list_empty(&dep->started_list)) + if ((status == -EXDEV && list_empty(&dep->started_list)) || + (usb_endpoint_xfer_isoc(dep->endpoint.desc) && + list_empty(&dep->started_list) && + list_empty(&dep->pending_list)))The -EXDEV check is also for isoc, maybe rearrange this for easier read: if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && list_empty(&dep->started_list) && (list_empty(&dep->pending_list) || status == -EXDEV))
Right, I will change it in v3.
dwc3_stop_active_transfer(dep, true, true); else if (dwc3_gadget_ep_should_continue(dep)) if (__dwc3_gadget_kick_transfer(dep, false) == 0)
Thanks, Michael -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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