Commit 8e7cf0b1 authored Dec 22, 2015 by John Youn Committed by Dmitry Shmidt Aug 18, 2017

UPSTREAM: usb: dwc3: gadget: don't send extra ZLP



If the request->length is zero, a ZLP should already be sent due to that
and another ZLP is not needed to terminate the transfer.

(cherry-picked from commit
d9261898a4b2c143c28568dc686a1becfc637a99)

Fixes: 04c03d10e507 ("usb: dwc3: gadget: handle request->zero")
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Bug: 63867169
Change-Id: I97a1801c57dc169b6e9371d5aec599a14f316aff

parent 9e6afd4e

drivers/usb/dwc3/gadget.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1259,7 +1259,8 @@ static int dwc3_gadget_ep_queue(struct usb_ep ep, struct usb_request request,
		* extra usb_request ourselves so that it gets handled the same way as
		* any other request.
		*/
		if (ret == 0 && request->zero && (request->length % ep->maxpacket == 0))
		if (ret == 0 && request->zero && request->length &&
		(request->length % ep->maxpacket == 0))
		ret = __dwc3_gadget_ep_queue_zlp(dwc, dep);

		out: