From b787d75503fb6f68aea5220ca23bb0c02d14ae74 Mon Sep 17 00:00:00 2001 From: Mian Yousaf Kaukab Date: Fri, 9 Jan 2015 13:38:43 +0100 Subject: [PATCH] usb: dwc2: gadget: don't process XferCompl on setup packet Only process DOEPINT.XferCompl on data packet as DOEPINTn.SetUp can occur with or without DOEPINT.XferCompl. When DOEPINT.SetUp occurs with DOEPINT.XferCompl, only DOEPINT.SetUp needs to be handled. Moreover, ignore DOEPINT.XferCompl when it occurs with DOEPINT.StupPktRcvd as driver needs to wait for DOEPINT.SetUp to continue. Tested-by: Robert Baldyga Acked-by: Paul Zimmerman Signed-off-by: Mian Yousaf Kaukab Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/gadget.c | 4 ++++ drivers/usb/dwc2/hw.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 843f3ee0fbbd..45afbf840f03 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -1810,6 +1810,10 @@ static void s3c_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx, dev_dbg(hsotg->dev, "%s: ep%d(%s) DxEPINT=0x%08x\n", __func__, idx, dir_in ? "in" : "out", ints); + /* Don't process XferCompl interrupt if it is a setup packet */ + if (idx == 0 && (ints & (DXEPINT_SETUP | DXEPINT_SETUP_RCVD))) + ints &= ~DXEPINT_XFERCOMPL; + if (ints & DXEPINT_XFERCOMPL) { if (hs_ep->isochronous && hs_ep->interval == 1) { if (ctrl & DXEPCTL_EOFRNUM) diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h index 51248b935493..d018ebef15cc 100644 --- a/drivers/usb/dwc2/hw.h +++ b/drivers/usb/dwc2/hw.h @@ -541,6 +541,7 @@ #define DIEPINT(_a) HSOTG_REG(0x908 + ((_a) * 0x20)) #define DOEPINT(_a) HSOTG_REG(0xB08 + ((_a) * 0x20)) +#define DXEPINT_SETUP_RCVD (1 << 15) #define DXEPINT_INEPNAKEFF (1 << 6) #define DXEPINT_BACK2BACKSETUP (1 << 6) #define DXEPINT_INTKNEPMIS (1 << 5) -- 2.20.1