usb: dwc3: gadget: Return success always for kick transfer in ep queue

If an error is received when issuing a start or update transfer
command, the error handler will stop all active requests (including
the current USB request), and call dwc3_gadget_giveback() to notify
function drivers of the requests which have been stopped.  Avoid
returning an error for kick transfer during EP queue, to remove
duplicate cleanup operations on the request being queued.

Fixes: 8d99087c2db8 ("usb: dwc3: gadget: Properly handle failed kick_transfer")
cc: stable@vger.kernel.org
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Link: https://lore.kernel.org/r/1620410119-24971-1-git-send-email-wcheng@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index dd1342403bb24212e7ca1aeebcb1fbb317914798..49ca5da5e2794866148b66b93570797e661a163b 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1684,7 +1684,9 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
                }
        }
 
-       return __dwc3_gadget_kick_transfer(dep);
+       __dwc3_gadget_kick_transfer(dep);
+
+       return 0;
 }
 
 static int dwc3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request,