usb: dwc3: workaround: missing disconnect event

DWC3 revisions <1.88a have an issue which would
case a missing Disconnect event if cable is
disconnected while there's a Setup packet
pending the FIFO.

Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 314acb289d23..ed44525c8d62 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -625,6 +625,7 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
         struct dwc3_ep          *dep = dwc->eps[event->endpoint_number];
 
         dep->flags &= ~DWC3_EP_BUSY;
+        dwc->setup_packet_pending = false;
 
         switch (dwc->ep0state) {
         case EP0_SETUP_PHASE:
@@ -726,6 +727,8 @@ static void dwc3_ep0_do_control_status(struct dwc3 *dwc, u32 epnum)
 static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
                 const struct dwc3_event_depevt *event)
 {
+        dwc->setup_packet_pending = true;
+
         /*
          * This part is very tricky: If we has just handled
          * XferNotReady(Setup) and we're now expecting a