ntb_hw_switchtec: Optimize function switchtec_ntb_reinit_peer()

Function switchtec_ntb_reinit_peer() is used to reinitialize the shared NTB
memory window. it doesn't need to free and reallocate the memory. We can
implement it by reconfiguring the reseved LUT window.

Signed-off-by: Joey Zhang <[email protected]>

Author: Joey Zhang

ntb_hw_switchtec.c

@@ -502,16 +502,10 @@ static int switchtec_ntb_reinit_peer(struct switchtec_ntb *sndev);
 
 static void link_reinit_work(struct work_struct *work)
 {
-	int link_sta;
 	struct switchtec_ntb *sndev;
 
 	sndev = container_of(work, struct switchtec_ntb, link_reinit_work);
-
-	link_sta = sndev->self_shared->link_sta;
-
 	switchtec_ntb_reinit_peer(sndev);
-
-	sndev->self_shared->link_sta = link_sta;
 }
 
 static void switchtec_ntb_check_link(struct switchtec_ntb *sndev,
@@ -1447,10 +1441,13 @@ static void switchtec_ntb_deinit_db_msg_irq(struct switchtec_ntb *sndev)
 
 static int switchtec_ntb_reinit_peer(struct switchtec_ntb *sndev)
 {
-	dev_info(&sndev->stdev->dev, "peer reinitialized\n");
-	switchtec_ntb_deinit_shared_mw(sndev);
-	switchtec_ntb_init_mw(sndev);
-	return switchtec_ntb_init_shared_mw(sndev);
+	int rc;
+
+	dev_info(&sndev->stdev->dev, "reinitialize shared memory window\n");
+	rc = config_rsvd_lut_win(sndev, sndev->mmio_peer_ctrl, 0,
+				 sndev->self_partition,
+				 sndev->self_shared_dma);
+	return rc;
 }
 
 static int switchtec_ntb_add(struct device *dev,