usb: dwc3: add cancelled reasons for dwc3 requests

Currently, when dwc3 handles request cancelled, dwc3 just returns
-ECONNRESET for all requests. It will cause USB function drivers
can't know if the requests are cancelled by other reasons.

This patch will replace DWC3_REQUEST_STATUS_CANCELLED with the
reasons below.
  - DWC3_REQUEST_STATUS_DISCONNECTED
  - DWC3_REQUEST_STATUS_DEQUEUED
  - DWC3_REQUEST_STATUS_STALLED

Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Ray Chi <raychi@google.com>
Link: https://lore.kernel.org/r/20210327181742.1810969-1-raychi@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h
index 0cd281949970..77df4b6d6c13 100644
--- a/drivers/usb/dwc3/gadget.h
+++ b/drivers/usb/dwc3/gadget.h
@@ -90,15 +90,17 @@ static inline void dwc3_gadget_move_started_request(struct dwc3_request *req)
 /**
  * dwc3_gadget_move_cancelled_request - move @req to the cancelled_list
  * @req: the request to be moved
+ * @reason: cancelled reason for the dwc3 request
  *
  * Caller should take care of locking. This function will move @req from its
  * current list to the endpoint's cancelled_list.
  */
-static inline void dwc3_gadget_move_cancelled_request(struct dwc3_request *req)
+static inline void dwc3_gadget_move_cancelled_request(struct dwc3_request *req,
+		unsigned int reason)
 {
 	struct dwc3_ep		*dep = req->dep;
 
-	req->status = DWC3_REQUEST_STATUS_CANCELLED;
+	req->status = reason;
 	list_move_tail(&req->list, &dep->cancelled_list);
 }