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Commit 1d6a3918 authored by Felipe Balbi's avatar Felipe Balbi
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usb: dwc3: gadget: start requests as soon as they come 



In an attempt to make dwc3 slightly faster, let's
start usb_requests as soon as they come as that will
let us avoid a XFER_NOT_READY event and save a little
bit of time.

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent fe84f522

drivers/usb/dwc3/gadget.c

+16 −0
Original line number Diff line number Diff line
@@ -1071,6 +1071,22 @@ 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:

	 *