--- zzzz-none-000/linux-3.10.107/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c	2021-02-04 17:41:59.000000000 +0000
@@ -1,7 +1,7 @@
 /*******************************************************************************
 
   Intel 10 Gigabit PCI Express Linux driver
-  Copyright(c) 1999 - 2013 Intel Corporation.
+  Copyright(c) 1999 - 2014 Intel Corporation.
 
   This program is free software; you can redistribute it and/or modify it
   under the terms and conditions of the GNU General Public License,
@@ -87,7 +87,6 @@
 	int min_credit;
 	int min_multiplier;
 	int min_percent = 100;
-	s32 ret_val = 0;
 	/* Initialization values default for Tx settings */
 	u32 credit_refill       = 0;
 	u32 credit_max          = 0;
@@ -95,10 +94,8 @@
 	u8  bw_percent          = 0;
 	u8  i;
 
-	if (dcb_config == NULL) {
-		ret_val = DCB_ERR_CONFIG;
-		goto out;
-	}
+	if (!dcb_config)
+		return DCB_ERR_CONFIG;
 
 	min_credit = ((max_frame / 2) + DCB_CREDIT_QUANTUM - 1) /
 			DCB_CREDIT_QUANTUM;
@@ -174,8 +171,7 @@
 		p->data_credits_max = (u16)credit_max;
 	}
 
-out:
-	return ret_val;
+	return 0;
 }
 
 void ixgbe_dcb_unpack_pfc(struct ixgbe_dcb_config *cfg, u8 *pfc_en)
@@ -236,7 +232,7 @@
 
 	/* If tc is 0 then DCB is likely not enabled or supported */
 	if (!tc)
-		goto out;
+		return 0;
 
 	/*
 	 * Test from maximum TC to 1 and report the first match we find.  If
@@ -247,7 +243,7 @@
 		if (prio_mask & tc_config[tc].path[direction].up_to_tc_bitmap)
 			break;
 	}
-out:
+
 	return tc;
 }
 
@@ -267,9 +263,8 @@
  * Configure dcb settings and enable dcb mode.
  */
 s32 ixgbe_dcb_hw_config(struct ixgbe_hw *hw,
-                        struct ixgbe_dcb_config *dcb_config)
+			struct ixgbe_dcb_config *dcb_config)
 {
-	s32 ret = 0;
 	u8 pfc_en;
 	u8 ptype[MAX_TRAFFIC_CLASS];
 	u8 bwgid[MAX_TRAFFIC_CLASS];
@@ -287,37 +282,35 @@
 
 	switch (hw->mac.type) {
 	case ixgbe_mac_82598EB:
-		ret = ixgbe_dcb_hw_config_82598(hw, pfc_en, refill, max,
-						bwgid, ptype);
-		break;
+		return ixgbe_dcb_hw_config_82598(hw, pfc_en, refill, max,
+						 bwgid, ptype);
 	case ixgbe_mac_82599EB:
 	case ixgbe_mac_X540:
-		ret = ixgbe_dcb_hw_config_82599(hw, pfc_en, refill, max,
-						bwgid, ptype, prio_tc);
-		break;
+	case ixgbe_mac_X550:
+	case ixgbe_mac_X550EM_x:
+		return ixgbe_dcb_hw_config_82599(hw, pfc_en, refill, max,
+						 bwgid, ptype, prio_tc);
 	default:
 		break;
 	}
-	return ret;
+	return 0;
 }
 
 /* Helper routines to abstract HW specifics from DCB netlink ops */
 s32 ixgbe_dcb_hw_pfc_config(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
 {
-	int ret = -EINVAL;
-
 	switch (hw->mac.type) {
 	case ixgbe_mac_82598EB:
-		ret = ixgbe_dcb_config_pfc_82598(hw, pfc_en);
-		break;
+		return ixgbe_dcb_config_pfc_82598(hw, pfc_en);
 	case ixgbe_mac_82599EB:
 	case ixgbe_mac_X540:
-		ret = ixgbe_dcb_config_pfc_82599(hw, pfc_en, prio_tc);
-		break;
+	case ixgbe_mac_X550:
+	case ixgbe_mac_X550EM_x:
+		return ixgbe_dcb_config_pfc_82599(hw, pfc_en, prio_tc);
 	default:
 		break;
 	}
-	return ret;
+	return -EINVAL;
 }
 
 s32 ixgbe_dcb_hw_ets(struct ixgbe_hw *hw, struct ieee_ets *ets, int max_frame)
@@ -368,6 +361,8 @@
 		break;
 	case ixgbe_mac_82599EB:
 	case ixgbe_mac_X540:
+	case ixgbe_mac_X550:
+	case ixgbe_mac_X550EM_x:
 		ixgbe_dcb_config_rx_arbiter_82599(hw, refill, max,
 						  bwg_id, prio_type, prio_tc);
 		ixgbe_dcb_config_tx_desc_arbiter_82599(hw, refill, max,
@@ -380,3 +375,27 @@
 	}
 	return 0;
 }
+
+static void ixgbe_dcb_read_rtrup2tc_82599(struct ixgbe_hw *hw, u8 *map)
+{
+	u32 reg, i;
+
+	reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
+	for (i = 0; i < MAX_USER_PRIORITY; i++)
+		map[i] = IXGBE_RTRUP2TC_UP_MASK &
+			(reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT));
+}
+
+void ixgbe_dcb_read_rtrup2tc(struct ixgbe_hw *hw, u8 *map)
+{
+	switch (hw->mac.type) {
+	case ixgbe_mac_82599EB:
+	case ixgbe_mac_X540:
+	case ixgbe_mac_X550:
+	case ixgbe_mac_X550EM_x:
+		ixgbe_dcb_read_rtrup2tc_82599(hw, map);
+		break;
+	default:
+		break;
+	}
+}