usb:cdnsp: remove TRB_FLUSH_ENDPOINT command

Patch removes TRB_FLUSH_ENDPOINT command from driver.
This command is not supported by controller and
USBSSP returns TRB Error completion code for it.

Signed-off-by: Pawel Laszczak <[e-mail]>
Acked-by: Peter Chen <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/cdns3/cdnsp-debug.h

···
 		return "Endpoint Not ready";
 	case TRB_HALT_ENDPOINT:
 		return "Halt Endpoint";
-	case TRB_FLUSH_ENDPOINT:
-		return "FLush Endpoint";
 	default:
 		return "UNKNOWN";
 	}
···
 		break;
 	case TRB_RESET_EP:
 	case TRB_HALT_ENDPOINT:
-	case TRB_FLUSH_ENDPOINT:
 		ret = snprintf(str, size,
 			       "%s: ep%d%s(%d) ctx %08x%08x slot %ld flags %c",
 			       cdnsp_trb_type_string(type),

drivers/usb/cdns3/cdnsp-gadget.c

···
 	pep->ep_state |= EP_DIS_IN_RROGRESS;
 
 	/* Endpoint was unconfigured by Reset Device command. */
-	if (!(pep->ep_state & EP_UNCONFIGURED)) {
+	if (!(pep->ep_state & EP_UNCONFIGURED))
 		cdnsp_cmd_stop_ep(pdev, pep);
-		cdnsp_cmd_flush_ep(pdev, pep);
-	}
 
 	/* Remove all queued USB requests. */
 	while (!list_empty(&pep->pending_list)) {
···
 static void cdnsp_stop(struct cdnsp_device *pdev)
 {
 	u32 temp;
-
-	cdnsp_cmd_flush_ep(pdev, &pdev->eps[0]);
 
 	/* Remove internally queued request for ep0. */
 	if (!list_empty(&pdev->eps[0].pending_list)) {

drivers/usb/cdns3/cdnsp-gadget.h

···
 #define TRB_HALT_ENDPOINT	54
 /* Doorbell Overflow Event. */
 #define TRB_DRB_OVERFLOW	57
-/* Flush Endpoint Command. */
-#define TRB_FLUSH_ENDPOINT	58
 
 #define TRB_TYPE_LINK(x)	(((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
 #define TRB_TYPE_LINK_LE32(x)	(((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
···
 void cdnsp_queue_reset_ep(struct cdnsp_device *pdev, unsigned int ep_index);
 void cdnsp_queue_halt_endpoint(struct cdnsp_device *pdev,
 			       unsigned int ep_index);
-void cdnsp_queue_flush_endpoint(struct cdnsp_device *pdev,
-				unsigned int ep_index);
 void cdnsp_force_header_wakeup(struct cdnsp_device *pdev, int intf_num);
 void cdnsp_queue_reset_device(struct cdnsp_device *pdev);
 void cdnsp_queue_new_dequeue_state(struct cdnsp_device *pdev,
···
 int cdnsp_halt_endpoint(struct cdnsp_device *pdev,
 			struct cdnsp_ep *pep, int value);
 int cdnsp_cmd_stop_ep(struct cdnsp_device *pdev, struct cdnsp_ep *pep);
-int cdnsp_cmd_flush_ep(struct cdnsp_device *pdev, struct cdnsp_ep *pep);
 void cdnsp_setup_analyze(struct cdnsp_device *pdev);
 int cdnsp_status_stage(struct cdnsp_device *pdev);
 int cdnsp_reset_device(struct cdnsp_device *pdev);

drivers/usb/cdns3/cdnsp-ring.c

···
 	return ret;
 }
 
-int cdnsp_cmd_flush_ep(struct cdnsp_device *pdev, struct cdnsp_ep *pep)
-{
-	int ret;
-
-	cdnsp_queue_flush_endpoint(pdev, pep->idx);
-	cdnsp_ring_cmd_db(pdev);
-	ret = cdnsp_wait_for_cmd_compl(pdev);
-
-	trace_cdnsp_handle_cmd_flush_ep(pep->out_ctx);
-
-	return ret;
-}
-
 /*
  * The transfer burst count field of the isochronous TRB defines the number of
  * bursts that are required to move all packets in this TD. Only SuperSpeed
···
 void cdnsp_queue_halt_endpoint(struct cdnsp_device *pdev, unsigned int ep_index)
 {
 	cdnsp_queue_command(pdev, 0, 0, 0, TRB_TYPE(TRB_HALT_ENDPOINT) |
-			    SLOT_ID_FOR_TRB(pdev->slot_id) |
-			    EP_ID_FOR_TRB(ep_index));
-}
-
-/*
- * Queue a flush endpoint request on the command ring.
- */
-void  cdnsp_queue_flush_endpoint(struct cdnsp_device *pdev,
-				 unsigned int ep_index)
-{
-	cdnsp_queue_command(pdev, 0, 0, 0, TRB_TYPE(TRB_FLUSH_ENDPOINT) |
 			    SLOT_ID_FOR_TRB(pdev->slot_id) |
 			    EP_ID_FOR_TRB(ep_index));
 }