usb: dwc3: gadget: issue a stop command for ISOC endpoint

Message ID 1548064976-30196-1-git-send-email-prime.zeng@hisilicon.com
State New
Headers show
Series
  • usb: dwc3: gadget: issue a stop command for ISOC endpoint
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Commit Message

z00214469 Jan. 21, 2019, 10:02 a.m.
For ISOC transfers, if there is no available data for a period, we need
to stop the transfer by issue a stop command, otherwise, all the
upcoming transfers will started by update transfer command, and will be
dropped with MISS ISOC errors.

Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com>

---
 drivers/usb/dwc3/gadget.c | 4 ++++
 1 file changed, 4 insertions(+)

-- 
2.7.4

Patch

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index e18c2a2..58e71ba 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2500,6 +2500,10 @@  static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep,
 			stop = true;
 	}
 
+	if (list_empty(&dep->started_list) &&
+	    (usb_endpoint_xfer_isoc(dep->endpoint.desc)))
+		stop = true;
+
 	dwc3_gadget_ep_cleanup_completed_requests(dep, event, status);
 
 	if (stop) {