usb: dwc3: gadget: don't interrupt when chained

It makes no sense to interrupt in the middle of
chained transfer. This patch just makes sure we
don't do that.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc3/gadget.c

@@ -804,7 +804,7 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 	/* always enable Continue on Short Packet */
 	trb->ctrl |= DWC3_TRB_CTRL_CSP;
 
-	if (!req->request.no_interrupt)
+	if (!req->request.no_interrupt && !chain)
 		trb->ctrl |= DWC3_TRB_CTRL_IOC | DWC3_TRB_CTRL_ISP_IMI;
 
 	if (last)