[PATCH 5.4 061/177] usb: dwc3: gadget: Clear started flag for non-IOC

Greg Kroah-Hartman
2019-12-16T18:16:54Z

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

commit d3abda5a98a18e524e17fd4085c9f4bd53e9ef53 upstream.

Normally the END_TRANSFER command completion handler will clear the
DWC3_EP_TRANSFER_STARTED flag. However, if the command was sent without
interrupt on completion, then the flag will not be cleared. Make sure to
clear the flag in this case.

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/gadget.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2719,6 +2719,9 @@ static void dwc3_stop_active_transfer(st
WARN_ON_ONCE(ret);
dep->resource_index = 0;

+ if (!interrupt)
+ dep->flags &= ~DWC3_EP_TRANSFER_STARTED;
+
if (dwc3_is_usb31(dwc) || dwc->revision < DWC3_REVISION_310A)
udelay(100);
}