diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c
index a507a6fe36243a32bc27409998fc25660c105ed5..02c7333a9c83c1c0e9bb8fe826687e4eb144c85b 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c
@@ -139,6 +139,11 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
 		/* Calculate credit refill ratio using multiplier */
 		credit_refill = min(link_percentage * min_multiplier,
 				    MAX_CREDIT_REFILL);
+
+		/* Refill at least minimum credit */
+		if (credit_refill < min_credit)
+			credit_refill = min_credit;
+
 		p->data_credits_refill = (u16)credit_refill;
 
 		/* Calculate maximum credit for the TC */
@@ -149,7 +154,7 @@ s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
 		 * of a TC is too small, the maximum credit may not be
 		 * enough to send out a jumbo frame in data plane arbitration.
 		 */
-		if (credit_max && (credit_max < min_credit))
+		if (credit_max < min_credit)
 			credit_max = min_credit;
 
 		if (direction == DCB_TX_CONFIG) {
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c
index 23277ab153b6b177f234e23a8895bcf90a9a6f5d..b5cc989a3d23afcada8cca2e754d9320f7a8144a 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c
@@ -223,13 +223,13 @@ s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
 	reg |= IXGBE_MFLCN_DPF;
 
 	/*
-	 * X540 supports per TC Rx priority flow control.  So
-	 * clear all TCs and only enable those that should be
+	 * X540 & X550 supports per TC Rx priority flow control.
+	 * So clear all TCs and only enable those that should be
 	 * enabled.
 	 */
 	reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);
 
-	if (hw->mac.type == ixgbe_mac_X540)
+	if (hw->mac.type >= ixgbe_mac_X540)
 		reg |= pfc_en << IXGBE_MFLCN_RPFCE_SHIFT;
 
 	if (pfc_en)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index 2448eba2eecd15e4d01423879c207f25f4375efd..bea96b3bc90c4c8889beed9536e53f8cca3a760a 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -185,9 +185,7 @@ static int ixgbe_get_settings(struct net_device *netdev,
 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
 	struct ixgbe_hw *hw = &adapter->hw;
 	ixgbe_link_speed supported_link;
-	u32 link_speed = 0;
 	bool autoneg = false;
-	bool link_up;
 
 	hw->mac.ops.get_link_capabilities(hw, &supported_link, &autoneg);
 
@@ -313,9 +311,8 @@ static int ixgbe_get_settings(struct net_device *netdev,
 		break;
 	}
 
-	hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
-	if (link_up) {
-		switch (link_speed) {
+	if (netif_carrier_ok(netdev)) {
+		switch (adapter->link_speed) {
 		case IXGBE_LINK_SPEED_10GB_FULL:
 			ethtool_cmd_speed_set(ecmd, SPEED_10000);
 			break;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
index 5f988703e1b7e464a75b936bf7fb1fbb7f997b2c..2a653ec954f53450be9a97ccac536f90c70bc802 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
@@ -77,7 +77,7 @@ int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
 	if (!netdev)
 		return 0;
 
-	if (xid >= IXGBE_FCOE_DDP_MAX)
+	if (xid >= netdev->fcoe_ddp_xid)
 		return 0;
 
 	adapter = netdev_priv(netdev);
@@ -177,7 +177,7 @@ static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
 		return 0;
 
 	adapter = netdev_priv(netdev);
-	if (xid >= IXGBE_FCOE_DDP_MAX) {
+	if (xid >= netdev->fcoe_ddp_xid) {
 		e_warn(drv, "xid=0x%x out-of-range\n", xid);
 		return 0;
 	}
@@ -517,6 +517,7 @@ int ixgbe_fso(struct ixgbe_ring *tx_ring,
 	u32 vlan_macip_lens;
 	u32 fcoe_sof_eof = 0;
 	u32 mss_l4len_idx;
+	u32 type_tucmd = IXGBE_ADVTXT_TUCMD_FCOE;
 	u8 sof, eof;
 
 	if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) {
@@ -593,6 +594,8 @@ int ixgbe_fso(struct ixgbe_ring *tx_ring,
 					       skb_shinfo(skb)->gso_size);
 		first->bytecount += (first->gso_segs - 1) * *hdr_len;
 		first->tx_flags |= IXGBE_TX_FLAGS_TSO;
+		/* Hardware expects L4T to be RSV for FCoE TSO */
+		type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_RSV;
 	}
 
 	/* set flag indicating FCOE to ixgbe_tx_map call */
@@ -610,7 +613,7 @@ int ixgbe_fso(struct ixgbe_ring *tx_ring,
 
 	/* write context desc */
 	ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof,
-			  IXGBE_ADVTXT_TUCMD_FCOE, mss_l4len_idx);
+			  type_tucmd, mss_l4len_idx);
 
 	return 0;
 }
@@ -996,8 +999,7 @@ int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
 		return -EINVAL;
 
 	/* Don't return information on unsupported devices */
-	if (hw->mac.type != ixgbe_mac_82599EB &&
-	    hw->mac.type != ixgbe_mac_X540)
+	if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
 		return -EINVAL;
 
 	/* Manufacturer */
@@ -1043,6 +1045,10 @@ int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
 		snprintf(info->model,
 			 sizeof(info->model),
 			 "Intel 82599");
+	} else if (hw->mac.type == ixgbe_mac_X550) {
+		snprintf(info->model,
+			 sizeof(info->model),
+			 "Intel X550");
 	} else {
 		snprintf(info->model,
 			 sizeof(info->model),
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index ea9537d0e63a9ddfbb4d2dfd4e19da197d9768fd..c4003a88bbf6ea1157261dd9378af6a45782c0c7 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1483,7 +1483,7 @@ static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
 			return;
 
 		if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_OUTERIPER)) {
-			ring->rx_stats.csum_err++;
+			skb->ip_summed = CHECKSUM_NONE;
 			return;
 		}
 		/* If we checked the outer header let the stack know */
@@ -3619,6 +3619,9 @@ void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
 	IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
 	IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
 			ring->count * sizeof(union ixgbe_adv_rx_desc));
+	/* Force flushing of IXGBE_RDLEN to prevent MDD */
+	IXGBE_WRITE_FLUSH(hw);
+
 	IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
 	IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
 	ring->tail = adapter->io_addr + IXGBE_RDT(reg_idx);
@@ -7570,7 +7573,9 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
 	/* snag network header to get L4 type and address */
 	skb = first->skb;
 	hdr.network = skb_network_header(skb);
-	if (skb->encapsulation) {
+	if (!skb->encapsulation) {
+		th = tcp_hdr(skb);
+	} else {
 #ifdef CONFIG_IXGBE_VXLAN
 		struct ixgbe_adapter *adapter = q_vector->adapter;
 
@@ -7589,14 +7594,34 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
 #else
 		return;
 #endif /* CONFIG_IXGBE_VXLAN */
-	} else {
-		/* Currently only IPv4/IPv6 with TCP is supported */
-		if ((first->protocol != htons(ETH_P_IPV6) ||
-		     hdr.ipv6->nexthdr != IPPROTO_TCP) &&
-		    (first->protocol != htons(ETH_P_IP) ||
-		     hdr.ipv4->protocol != IPPROTO_TCP))
+	}
+
+	/* Currently only IPv4/IPv6 with TCP is supported */
+	switch (hdr.ipv4->version) {
+	case IPVERSION:
+		if (hdr.ipv4->protocol != IPPROTO_TCP)
 			return;
-		th = tcp_hdr(skb);
+		break;
+	case 6:
+		if (likely((unsigned char *)th - hdr.network ==
+			   sizeof(struct ipv6hdr))) {
+			if (hdr.ipv6->nexthdr != IPPROTO_TCP)
+				return;
+		} else {
+			__be16 frag_off;
+			u8 l4_hdr;
+
+			ipv6_skip_exthdr(skb, hdr.network - skb->data +
+					      sizeof(struct ipv6hdr),
+					 &l4_hdr, &frag_off);
+			if (unlikely(frag_off))
+				return;
+			if (l4_hdr != IPPROTO_TCP)
+				return;
+		}
+		break;
+	default:
+		return;
 	}
 
 	/* skip this packet since it is invalid or the socket is closing */
@@ -7631,10 +7656,12 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
 		common.port.src ^= th->dest ^ first->protocol;
 	common.port.dst ^= th->source;
 
-	if (first->protocol == htons(ETH_P_IP)) {
+	switch (hdr.ipv4->version) {
+	case IPVERSION:
 		input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
 		common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
-	} else {
+		break;
+	case 6:
 		input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
 		common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
 			     hdr.ipv6->saddr.s6_addr32[1] ^
@@ -7644,6 +7671,9 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
 			     hdr.ipv6->daddr.s6_addr32[1] ^
 			     hdr.ipv6->daddr.s6_addr32[2] ^
 			     hdr.ipv6->daddr.s6_addr32[3];
+		break;
+	default:
+		break;
 	}
 
 #ifdef CONFIG_IXGBE_VXLAN
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 5f53cc6c609a0dca332c6040c6976c872df67031..bf7367a0871679137ed3dba60633af9462873ed9 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -2780,6 +2780,7 @@ struct ixgbe_adv_tx_context_desc {
 #define IXGBE_ADVTXD_TUCMD_L4T_UDP   0x00000000  /* L4 Packet TYPE of UDP */
 #define IXGBE_ADVTXD_TUCMD_L4T_TCP   0x00000800  /* L4 Packet TYPE of TCP */
 #define IXGBE_ADVTXD_TUCMD_L4T_SCTP  0x00001000  /* L4 Packet TYPE of SCTP */
+#define IXGBE_ADVTXD_TUCMD_L4T_RSV     0x00001800 /* RSV L4 Packet TYPE */
 #define IXGBE_ADVTXD_TUCMD_MKRREQ    0x00002000 /*Req requires Markers and CRC*/
 #define IXGBE_ADVTXD_POPTS_IPSEC      0x00000400 /* IPSec offload request */
 #define IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP 0x00002000 /* IPSec Type ESP */