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    Subject[PATCH 5.3 051/180] usb: dwc3: ep0: Clear started flag on completion
    Date
    From: Thinh Nguyen <Thinh.Nguyen@synopsys.com>

    commit 2d7b78f59e020b07fc6338eefe286f54ee2d6773 upstream.

    Clear ep0's DWC3_EP_TRANSFER_STARTED flag if the END_TRANSFER command is
    completed. Otherwise, we can't start control transfer again after
    END_TRANSFER.

    Cc: stable@vger.kernel.org
    Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
    Signed-off-by: Felipe Balbi <balbi@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/usb/dwc3/ep0.c | 8 ++++++++
    1 file changed, 8 insertions(+)

    --- a/drivers/usb/dwc3/ep0.c
    +++ b/drivers/usb/dwc3/ep0.c
    @@ -1117,6 +1117,9 @@ static void dwc3_ep0_xfernotready(struct
    void dwc3_ep0_interrupt(struct dwc3 *dwc,
    const struct dwc3_event_depevt *event)
    {
    + struct dwc3_ep *dep = dwc->eps[event->endpoint_number];
    + u8 cmd;
    +
    switch (event->endpoint_event) {
    case DWC3_DEPEVT_XFERCOMPLETE:
    dwc3_ep0_xfer_complete(dwc, event);
    @@ -1129,7 +1132,12 @@ void dwc3_ep0_interrupt(struct dwc3 *dwc
    case DWC3_DEPEVT_XFERINPROGRESS:
    case DWC3_DEPEVT_RXTXFIFOEVT:
    case DWC3_DEPEVT_STREAMEVT:
    + break;
    case DWC3_DEPEVT_EPCMDCMPLT:
    + cmd = DEPEVT_PARAMETER_CMD(event->parameters);
    +
    + if (cmd == DWC3_DEPCMD_ENDTRANSFER)
    + dep->flags &= ~DWC3_EP_TRANSFER_STARTED;
    break;
    }
    }

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