| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.3 051/180] usb: dwc3: ep0: Clear started flag on completion | Date | Mon, 16 Dec 2019 18:48:11 +0100 |
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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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