diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h
index 405918dd7b3f55f1ad2c3d9b2d290bd23bf33e9b..424672db7f127f8f975b3c5f51dd5e7e61c5b1f4 100644
--- a/include/uapi/linux/openvswitch.h
+++ b/include/uapi/linux/openvswitch.h
@@ -192,7 +192,6 @@ enum ovs_vport_type {
  * optional; if not specified a free port number is automatically selected.
  * Whether %OVS_VPORT_ATTR_OPTIONS is required or optional depends on the type
  * of vport.
- * and other attributes are ignored.
  *
  * For other requests, if %OVS_VPORT_ATTR_NAME is specified then it is used to
  * look up the vport to operate on; otherwise dp_idx from the &struct
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index 894b6cbdd9295841e6782268b8743fcb63358391..596d6373399dcb75275f13e8ae2637c15aec11e7 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c
@@ -130,9 +130,13 @@ static int set_eth_addr(struct sk_buff *skb,
 	if (unlikely(err))
 		return err;
 
+	skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
+
 	memcpy(eth_hdr(skb)->h_source, eth_key->eth_src, ETH_ALEN);
 	memcpy(eth_hdr(skb)->h_dest, eth_key->eth_dst, ETH_ALEN);
 
+	ovs_skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
+
 	return 0;
 }
 
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index d12d6b8b5e8b1e4cd7d0f6504882fb47a866c52c..0f783d9fa00d7f4955607363a3a51c4e189afdc4 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -739,10 +739,7 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
 	if (err)
 		goto err_flow_free;
 
-	err = ovs_flow_metadata_from_nlattrs(&flow->key.phy.priority,
-					     &flow->key.phy.skb_mark,
-					     &flow->key.phy.in_port,
-					     a[OVS_PACKET_ATTR_KEY]);
+	err = ovs_flow_metadata_from_nlattrs(flow, a[OVS_PACKET_ATTR_KEY]);
 	if (err)
 		goto err_flow_free;
 
@@ -1812,10 +1809,11 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
 	if (IS_ERR(vport))
 		goto exit_unlock;
 
-	err = 0;
 	if (a[OVS_VPORT_ATTR_TYPE] &&
-	    nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type)
+	    nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
 		err = -EINVAL;
+		goto exit_unlock;
+	}
 
 	reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 	if (!reply) {
@@ -1823,10 +1821,11 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
 		goto exit_unlock;
 	}
 
-	if (!err && a[OVS_VPORT_ATTR_OPTIONS])
+	if (a[OVS_VPORT_ATTR_OPTIONS]) {
 		err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
-	if (err)
-		goto exit_free;
+		if (err)
+			goto exit_free;
+	}
 
 	if (a[OVS_VPORT_ATTR_UPCALL_PID])
 		vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index b15321a2228c879a6a2bc56e950e7335be2a9507..093c191d4fc2571e0a34079d0f0d99cdb50b51de 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -590,10 +590,10 @@ static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
  *    - skb->network_header: just past the Ethernet header, or just past the
  *      VLAN header, to the first byte of the Ethernet payload.
  *
- *    - skb->transport_header: If key->dl_type is ETH_P_IP or ETH_P_IPV6
+ *    - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6
  *      on output, then just past the IP header, if one is present and
  *      of a correct length, otherwise the same as skb->network_header.
- *      For other key->dl_type values it is left untouched.
+ *      For other key->eth.type values it is left untouched.
  */
 int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
 		 int *key_lenp)
@@ -618,6 +618,9 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key,
 	memcpy(key->eth.dst, eth->h_dest, ETH_ALEN);
 
 	__skb_pull(skb, 2 * ETH_ALEN);
+	/* We are going to push all headers that we pull, so no need to
+	 * update skb->csum here.
+	 */
 
 	if (vlan_tx_tag_present(skb))
 		key->eth.tci = htons(skb->vlan_tci);
@@ -1122,10 +1125,8 @@ int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
 
 /**
  * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
- * @priority: receives the skb priority
- * @mark: receives the skb mark
- * @in_port: receives the extracted input port.
- * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
+ * @flow: Receives extracted in_port, priority, tun_key and skb_mark.
+ * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
  * sequence.
  *
  * This parses a series of Netlink attributes that form a flow key, which must
@@ -1133,15 +1134,15 @@ int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
  * get the metadata, that is, the parts of the flow key that cannot be
  * extracted from the packet itself.
  */
-int ovs_flow_metadata_from_nlattrs(u32 *priority, u32 *mark, u16 *in_port,
-			       const struct nlattr *attr)
+int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,
+				   const struct nlattr *attr)
 {
 	const struct nlattr *nla;
 	int rem;
 
-	*in_port = DP_MAX_PORTS;
-	*priority = 0;
-	*mark = 0;
+	flow->key.phy.in_port = DP_MAX_PORTS;
+	flow->key.phy.priority = 0;
+	flow->key.phy.skb_mark = 0;
 
 	nla_for_each_nested(nla, attr, rem) {
 		int type = nla_type(nla);
@@ -1152,17 +1153,17 @@ int ovs_flow_metadata_from_nlattrs(u32 *priority, u32 *mark, u16 *in_port,
 
 			switch (type) {
 			case OVS_KEY_ATTR_PRIORITY:
-				*priority = nla_get_u32(nla);
+				flow->key.phy.priority = nla_get_u32(nla);
 				break;
 
 			case OVS_KEY_ATTR_IN_PORT:
 				if (nla_get_u32(nla) >= DP_MAX_PORTS)
 					return -EINVAL;
-				*in_port = nla_get_u32(nla);
+				flow->key.phy.in_port = nla_get_u32(nla);
 				break;
 
 			case OVS_KEY_ATTR_SKB_MARK:
-				*mark = nla_get_u32(nla);
+				flow->key.phy.skb_mark = nla_get_u32(nla);
 				break;
 			}
 		}
diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
index 0875fde65b9cc21815b725ac84d579efbd64a2da..2a83e2141f088921ebae9956fc828d86dcd93c3e 100644
--- a/net/openvswitch/flow.h
+++ b/net/openvswitch/flow.h
@@ -141,8 +141,8 @@ u64 ovs_flow_used_time(unsigned long flow_jiffies);
 int ovs_flow_to_nlattrs(const struct sw_flow_key *, struct sk_buff *);
 int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
 		      const struct nlattr *);
-int ovs_flow_metadata_from_nlattrs(u32 *priority, u32 *mark, u16 *in_port,
-			       const struct nlattr *);
+int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,
+				  const struct nlattr *attr);
 
 #define MAX_ACTIONS_BUFSIZE    (16 * 1024)
 #define TBL_MIN_BUCKETS		1024
diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c
index 84e0a03791867449247cc0c161ab434f9a6e5c15..e284c7e1fec441b427fc52c72505952dab84fcbb 100644
--- a/net/openvswitch/vport-internal_dev.c
+++ b/net/openvswitch/vport-internal_dev.c
@@ -221,6 +221,7 @@ static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
 	skb->dev = netdev;
 	skb->pkt_type = PACKET_HOST;
 	skb->protocol = eth_type_trans(skb, netdev);
+	skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
 
 	netif_rx(skb);
 
diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c
index 4f01c6d2ffa40dcdb92856d6b35782a43679ad66..40de815b421383ac301d264265ebee210eb1a639 100644
--- a/net/openvswitch/vport-netdev.c
+++ b/net/openvswitch/vport-netdev.c
@@ -49,6 +49,8 @@ static void netdev_port_receive(struct vport *vport, struct sk_buff *skb)
 		return;
 
 	skb_push(skb, ETH_HLEN);
+	ovs_skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
+
 	ovs_vport_receive(vport, skb);
 	return;
 
@@ -170,7 +172,7 @@ static int netdev_send(struct vport *vport, struct sk_buff *skb)
 		net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
 				     netdev_vport->dev->name,
 				     packet_length(skb), mtu);
-		goto error;
+		goto drop;
 	}
 
 	skb->dev = netdev_vport->dev;
@@ -179,9 +181,8 @@ static int netdev_send(struct vport *vport, struct sk_buff *skb)
 
 	return len;
 
-error:
+drop:
 	kfree_skb(skb);
-	ovs_vport_record_error(vport, VPORT_E_TX_DROPPED);
 	return 0;
 }
 
diff --git a/net/openvswitch/vport-netdev.h b/net/openvswitch/vport-netdev.h
index a3cb3a32cd77140369a448337120c79f8a040ab0..dd298b5c5cdb25e1a721e5b845353ce055c02e60 100644
--- a/net/openvswitch/vport-netdev.h
+++ b/net/openvswitch/vport-netdev.h
@@ -39,6 +39,5 @@ netdev_vport_priv(const struct vport *vport)
 }
 
 const char *ovs_netdev_get_name(const struct vport *);
-const char *ovs_netdev_get_config(const struct vport *);
 
 #endif /* vport_netdev.h */
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index 720623190eaa82d9ad4a2fcf460a0270cf57a03b..176d449351eb24c7d0dbca9edbde711d510de087 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -351,7 +351,7 @@ int ovs_vport_send(struct vport *vport, struct sk_buff *skb)
 {
 	int sent = vport->ops->send(vport, skb);
 
-	if (likely(sent)) {
+	if (likely(sent > 0)) {
 		struct pcpu_tstats *stats;
 
 		stats = this_cpu_ptr(vport->percpu_stats);
@@ -360,7 +360,12 @@ int ovs_vport_send(struct vport *vport, struct sk_buff *skb)
 		stats->tx_packets++;
 		stats->tx_bytes += sent;
 		u64_stats_update_end(&stats->syncp);
-	}
+	} else if (sent < 0) {
+		ovs_vport_record_error(vport, VPORT_E_TX_ERROR);
+		kfree_skb(skb);
+	} else
+		ovs_vport_record_error(vport, VPORT_E_TX_DROPPED);
+
 	return sent;
 }
 
@@ -371,7 +376,7 @@ int ovs_vport_send(struct vport *vport, struct sk_buff *skb)
  * @err_type: one of enum vport_err_type types to indicate the error type
  *
  * If using the vport generic stats layer indicate that an error of the given
- * type has occured.
+ * type has occurred.
  */
 void ovs_vport_record_error(struct vport *vport, enum vport_err_type err_type)
 {
diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h
index 68a377bc0841e7bfd0a5b1200a4a3b938adc9251..293278c4c2df8b3774074af997fe0a1125bc74b7 100644
--- a/net/openvswitch/vport.h
+++ b/net/openvswitch/vport.h
@@ -123,9 +123,8 @@ struct vport_parms {
  * existing vport to a &struct sk_buff.  May be %NULL for a vport that does not
  * have any configuration.
  * @get_name: Get the device's name.
- * @get_config: Get the device's configuration.
- * May be null if the device does not have an ifindex.
- * @send: Send a packet on the device.  Returns the length of the packet sent.
+ * @send: Send a packet on the device.  Returns the length of the packet sent,
+ * zero for dropped packets or negative for error.
  */
 struct vport_ops {
 	enum ovs_vport_type type;
@@ -139,7 +138,6 @@ struct vport_ops {
 
 	/* Called with rcu_read_lock or ovs_mutex. */
 	const char *(*get_name)(const struct vport *);
-	void (*get_config)(const struct vport *, void *);
 
 	int (*send)(struct vport *, struct sk_buff *);
 };
@@ -194,4 +192,11 @@ void ovs_vport_record_error(struct vport *, enum vport_err_type err_type);
 extern const struct vport_ops ovs_netdev_vport_ops;
 extern const struct vport_ops ovs_internal_vport_ops;
 
+static inline void ovs_skb_postpush_rcsum(struct sk_buff *skb,
+				      const void *start, unsigned int len)
+{
+	if (skb->ip_summed == CHECKSUM_COMPLETE)
+		skb->csum = csum_add(skb->csum, csum_partial(start, len, 0));
+}
+
 #endif /* vport.h */