diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 75e9ba7c735e76..68873a1f2bb9e5 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1072,6 +1072,22 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) list_add_tail(&req->list, &dep->request_list); + /* + * If there are no pending requests and the endpoint isn't already + * busy, we will just start the request straight away. + * + * This will save one IRQ (XFER_NOT_READY) and possibly make it a + * little bit faster. + */ + if (!usb_endpoint_xfer_isoc(dep->endpoint.desc) && + !(dep->flags & DWC3_EP_BUSY)) { + ret = __dwc3_gadget_kick_transfer(dep, 0, true); + if (ret && ret != -EBUSY) + dev_dbg(dwc->dev, "%s: failed to kick transfers\n", + dep->name); + return ret; + } + /* * There are a few special cases: *