From: Felipe Balbi Date: Thu, 6 Oct 2016 14:10:39 +0000 (+0300) Subject: usb: dwc3: gadget: CSP is only valid for OUT endpoints X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=58f29034b4c47b202f76de055f843316c8a9325f;p=linux-beck.git usb: dwc3: gadget: CSP is only valid for OUT endpoints CSP bit is only valid for OUT endpoints. Synopsys databook is unclear if HW ignores CSP for IN endpoints (chances are, it does) but to avoid problems, let's make sure to set CSP only when valid to do so. Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 2dfcbecec25c..270e837f16e0 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -875,7 +875,8 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, } /* always enable Continue on Short Packet */ - trb->ctrl |= DWC3_TRB_CTRL_CSP; + if (usb_endpoint_dir_out(dep->endpoint.desc)) + trb->ctrl |= DWC3_TRB_CTRL_CSP; if ((!req->request.no_interrupt && !chain) || (dwc3_calc_trbs_left(dep) == 0))