With several improvements on handling of ClearFeature(halt), there
is one case of delayed status missing: if the xfernotready event
comes after end transfer and clear ep stall command completion,
we can not send the delayed status in dwc3_ep0_send_delayed_status()
as the ep0status is not ready, then in xfernotready event we still
can not send status because delayed_status is still set.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: d97c78a1908e ("usb: dwc3: gadget: END_TRANSFER before CLEAR_STALL command")
Signed-off-by: Li Jun <jun.li@xxxxxxx>
---
drivers/usb/dwc3/ep0.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 7be3903..9580e9f 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -1058,10 +1058,16 @@ void dwc3_ep0_send_delayed_status(struct dwc3 *dwc)
{
unsigned int direction = !dwc->ep0_expect_in;
+ /*
+ * If we are ready to send delayed status
+ * but wait status pharse, we can clear
+ * delayed_status flag to let EP0 XferNotReady
+ * handle it as a normal status sending.
+ */
+ dwc->delayed_status = false;
if (dwc->ep0state != EP0_STATUS_PHASE)
return;
- dwc->delayed_status = false;
__dwc3_ep0_do_control_status(dwc, dwc->eps[direction]);
}
--
2.7.4
