From 2d7b78f59e020b07fc6338eefe286f54ee2d6773 Mon Sep 17 00:00:00 2001

From: Thinh Nguyen <Thinh.Nguyen@synopsys.com>

Date: Wed, 27 Nov 2019 13:10:54 -0800

Subject: [PATCH] usb: dwc3: ep0: Clear started flag on completion

Git-commit: 2d7b78f59e020b07fc6338eefe286f54ee2d6773

Patch-mainline: v5.5-rc2

References: bsc#1051510

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>

Acked-by: Takashi Iwai <tiwai@suse.de>

---

 drivers/usb/dwc3/ep0.c | 8 ++++++++

 1 file changed, 8 insertions(+)

diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c

index 3996b9c4ff8d..fd1b100d2927 100644

--- a/drivers/usb/dwc3/ep0.c

+++ b/drivers/usb/dwc3/ep0.c

@@ -1117,6 +1117,9 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,

 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;

 	}

 }

-- 

2.16.4