From: Felipe Balbi Date: Wed, 5 Oct 2016 11:26:23 +0000 (+0300) Subject: usb: dwc3: gadget: only interrupt on short if short_not_ok is set X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c9508c8c50f9ec6fc3e7e823f35c76fafba7e929;p=linux-beck.git usb: dwc3: gadget: only interrupt on short if short_not_ok is set We don't need to know about short packets unless gadget driver told us it's not ok to see them on the bus. In the normal situation we can continue processing the list of requests if we get a Short packet. Also, note that we're making sure ISP is only set for OUT endpoints, where that setting is valid. Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 270e837f16e0..71d01b29e7b5 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -875,12 +875,16 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, } /* always enable Continue on Short Packet */ - if (usb_endpoint_dir_out(dep->endpoint.desc)) + if (usb_endpoint_dir_out(dep->endpoint.desc)) { trb->ctrl |= DWC3_TRB_CTRL_CSP; + if (req->request.short_not_ok) + trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; + } + if ((!req->request.no_interrupt && !chain) || (dwc3_calc_trbs_left(dep) == 0)) - trb->ctrl |= DWC3_TRB_CTRL_IOC | DWC3_TRB_CTRL_ISP_IMI; + trb->ctrl |= DWC3_TRB_CTRL_IOC; if (chain) trb->ctrl |= DWC3_TRB_CTRL_CHN;