usb: dwc3: gadget: introduce cancelled_list

This list will host cancelled requests who still have TRBs being
processed.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

3 files changed, 18 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 8405519413a4..9798c73c09ce 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -646,6 +646,7 @@ struct dwc3_event_buffer {
 /**
  * struct dwc3_ep - device side endpoint representation
  * @endpoint: usb endpoint
+ * @cancelled_list: list of cancelled requests for this endpoint
  * @pending_list: list of pending requests for this endpoint
  * @started_list: list of started requests on this endpoint
  * @wait_end_transfer: wait_queue_head_t for waiting on End Transfer complete
@@ -673,6 +674,7 @@ struct dwc3_event_buffer {
  */
 struct dwc3_ep {
         struct usb_ep           endpoint;
+        struct list_head        cancelled_list;
         struct list_head        pending_list;
         struct list_head        started_list;
 
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 9728978070b7..17203944d77f 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2284,6 +2284,7 @@ static int dwc3_gadget_init_endpoint(struct dwc3 *dwc, u8 epnum)
 
         INIT_LIST_HEAD(&dep->pending_list);
         INIT_LIST_HEAD(&dep->started_list);
+        INIT_LIST_HEAD(&dep->cancelled_list);
 
         return 0;
 }
diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h
index 2aacd1afd9ff..023a473648eb 100644
--- a/drivers/usb/dwc3/gadget.h
+++ b/drivers/usb/dwc3/gadget.h
@@ -79,6 +79,21 @@ static inline void dwc3_gadget_move_started_request(struct dwc3_request *req)
         list_move_tail(&req->list, &dep->started_list);
 }
 
+/**
+ * dwc3_gadget_move_cancelled_request - move @req to the cancelled_list
+ * @req: the request to be moved
+ *
+ * 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)
+{
+        struct dwc3_ep          *dep = req->dep;
+
+        req->started = false;
+        list_move_tail(&req->list, &dep->cancelled_list);
+}
+
 void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
                 int status);