From c3b22fe2e4cc45adb037e204e08910e10c5e9286 Mon Sep 17 00:00:00 2001 From: Razmik Karapetyan Date: Wed, 16 Nov 2016 15:33:57 -0800 Subject: [PATCH] usb: dwc2: Fix Control Write issue in DMA mode While sending zlp for DWC2_EP0_STATUS_IN EP direction was changed to IN. Change it back to complete OUT transfer request. This affects only on DMA mode, because DMA buffer map/unmap function is direction sensitive. Signed-off-by: Razmik Karapetyan Signed-off-by: John Youn Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/gadget.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 4dd5f1e2d281..39eccbb008b7 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2527,6 +2527,13 @@ static void dwc2_hsotg_complete_in(struct dwc2_hsotg *hsotg, /* Finish ZLP handling for IN EP0 transactions */ if (hs_ep->index == 0 && hsotg->ep0_state == DWC2_EP0_STATUS_IN) { dev_dbg(hsotg->dev, "zlp packet sent\n"); + + /* + * While send zlp for DWC2_EP0_STATUS_IN EP direction was + * changed to IN. Change back to complete OUT transfer request + */ + hs_ep->dir_in = 0; + dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0); if (hsotg->test_mode) { int ret; -- 2.20.1