usb: chipidea: udc: zero-length packet is only needed for TX



The zero-length packet is the sendor tells the receiver that there
is no more data, so it is only needed at the TX side.

Signed-off-by: Peter Chen <peter.chen@freescale.com>

parent 11a27098

drivers/usb/chipidea/udc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -445,7 +445,7 @@ static int _hardware_enqueue(struct ci_hw_ep hwep, struct ci_hw_req hwreq)
		rest -= count;
		}

		if (hwreq->req.zero && hwreq->req.length
		if (hwreq->req.zero && hwreq->req.length && hwep->dir == TX
		&& (hwreq->req.length % hwep->ep.maxpacket == 0))
		add_td_to_list(hwep, hwreq, 0);