[azure,v1,1/9] Revert "UBUNTU: SAUCE: netvsc: keep track of vf passthrough statistics"

diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index c75188297ffd..d20d794d396f 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -718,7 +718,6 @@  struct net_device_context {
 	/* State to manage the associated VF interface. */
 	struct net_device __rcu *vf_netdev;
 	struct work_struct vf_takeover;
-	struct pcpu_sw_netstats __percpu *vf_stats;
 
 	/* 1: allocated, serial number is valid. 0: not allocated */
 	u32 vf_alloc;
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index cefd7d895397..f93106e69d80 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -374,16 +374,8 @@  static u32 net_checksum_info(struct sk_buff *skb)
 static int netvsc_vf_xmit(struct net_device *net, struct net_device *vf_netdev,
 			  struct sk_buff *skb)
 {
-	struct net_device_context *ndev_ctx = netdev_priv(net);
-	struct pcpu_sw_netstats *pcpu_stats
-		 = this_cpu_ptr(ndev_ctx->vf_stats);
-
 	skb->dev = vf_netdev;
-
-	u64_stats_update_begin(&pcpu_stats->syncp);
-	pcpu_stats->tx_packets++;
-	pcpu_stats->tx_bytes += skb->len;
-	u64_stats_update_end(&pcpu_stats->syncp);
+	/* TODO stats */
 
 	return dev_queue_xmit(skb);
 }
@@ -946,35 +938,6 @@  static int netvsc_change_mtu(struct net_device *ndev, int mtu)
 	return ret;
 }
 
-static void netvsc_get_vf_stats(struct net_device *net,
-				struct pcpu_sw_netstats *tot)
-{
-	struct net_device_context *ndev_ctx = netdev_priv(net);
-	int i;
-
-	memset(tot, 0, sizeof(*tot));
-
-	for_each_possible_cpu(i) {
-		const struct pcpu_sw_netstats *stats
-			= per_cpu_ptr(ndev_ctx->vf_stats, i);
-		u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
-		unsigned int start;
-
-		do {
-			start = u64_stats_fetch_begin_irq(&stats->syncp);
-			rx_packets = stats->rx_packets;
-			tx_packets = stats->tx_packets;
-			rx_bytes = stats->rx_bytes;
-			tx_bytes = stats->tx_bytes;
-		} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
-
-		tot->rx_packets += rx_packets;
-		tot->tx_packets += tx_packets;
-		tot->rx_bytes   += rx_bytes;
-		tot->tx_bytes   += tx_bytes;
-	}
-}
-
 static void netvsc_get_stats64(struct net_device *net,
 			       struct rtnl_link_stats64 *t)
 {
@@ -985,19 +948,6 @@  static void netvsc_get_stats64(struct net_device *net,
 	if (!nvdev)
 		return;
 
-	netdev_stats_to_stats64(t, &net->stats);
-
-	if (transparent_vf) {
-		struct pcpu_sw_netstats vf_tot;
-
-		netvsc_get_vf_stats(net, &vf_tot);
-
-		t->rx_packets += vf_tot.rx_packets;
-		t->tx_packets += vf_tot.tx_packets;
-		t->rx_bytes   += vf_tot.rx_bytes;
-		t->tx_bytes   += vf_tot.tx_bytes;
-	}
-
 	for (i = 0; i < nvdev->num_chn; i++) {
 		const struct netvsc_channel *nvchan = &nvdev->chan_table[i];
 		const struct netvsc_stats *stats;
@@ -1026,6 +976,12 @@  static void netvsc_get_stats64(struct net_device *net,
 		t->rx_packets	+= packets;
 		t->multicast	+= multicast;
 	}
+
+	t->tx_dropped	= net->stats.tx_dropped;
+	t->tx_errors	= net->stats.tx_errors;
+
+	t->rx_dropped	= net->stats.rx_dropped;
+	t->rx_errors	= net->stats.rx_errors;
 }
 
 static int netvsc_set_mac_addr(struct net_device *ndev, void *p)
@@ -1061,15 +1017,9 @@  static const struct {
 	{ "tx_no_space",  offsetof(struct netvsc_ethtool_stats, tx_no_space) },
 	{ "tx_too_big",	  offsetof(struct netvsc_ethtool_stats, tx_too_big) },
 	{ "tx_busy",	  offsetof(struct netvsc_ethtool_stats, tx_busy) },
-}, vf_stats[] = {
-	{ "vf_rx_packets", offsetof(struct pcpu_sw_netstats, rx_packets) },
-	{ "vf_rx_bytes",   offsetof(struct pcpu_sw_netstats, rx_bytes) },
-	{ "vf_tx_packets", offsetof(struct pcpu_sw_netstats, tx_packets) },
-	{ "vf_tx_bytes",   offsetof(struct pcpu_sw_netstats, tx_bytes) },
 };
 
 #define NETVSC_GLOBAL_STATS_LEN	ARRAY_SIZE(netvsc_stats)
-#define NETVSC_VF_STATS_LEN	ARRAY_SIZE(vf_stats)
 
 /* 4 statistics per queue (rx/tx packets/bytes) */
 #define NETVSC_QUEUE_STATS_LEN(dev) ((dev)->num_chn * 4)
@@ -1084,9 +1034,7 @@  static int netvsc_get_sset_count(struct net_device *dev, int string_set)
 
 	switch (string_set) {
 	case ETH_SS_STATS:
-		return NETVSC_GLOBAL_STATS_LEN
-			+ (transparent_vf ? NETVSC_VF_STATS_LEN : 0)
-			+ NETVSC_QUEUE_STATS_LEN(nvdev);
+		return NETVSC_GLOBAL_STATS_LEN + NETVSC_QUEUE_STATS_LEN(nvdev);
 	default:
 		return -EINVAL;
 	}
@@ -1109,14 +1057,6 @@  static void netvsc_get_ethtool_stats(struct net_device *dev,
 	for (i = 0; i < NETVSC_GLOBAL_STATS_LEN; i++)
 		data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset);
 
-	if (transparent_vf) {
-		struct pcpu_sw_netstats sum;
-
-		netvsc_get_vf_stats(dev, &sum);
-		for (j = 0; j < NETVSC_VF_STATS_LEN; j++)
-			data[i++] = *(u64 *)((void *)&sum + vf_stats[j].offset);
-	}
-
 	for (j = 0; j < nvdev->num_chn; j++) {
 		qstats = &nvdev->chan_table[j].tx_stats;
 
@@ -1151,18 +1091,11 @@  static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 
 	switch (stringset) {
 	case ETH_SS_STATS:
-		for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) {
-			memcpy(p, netvsc_stats[i].name, ETH_GSTRING_LEN);
-			p += ETH_GSTRING_LEN;
-		}
-
-		if (transparent_vf) {
-			for (i = 0; i < ARRAY_SIZE(vf_stats); i++) {
-				memcpy(p, vf_stats[i].name, ETH_GSTRING_LEN);
-				p += ETH_GSTRING_LEN;
-			}
-		}
+		for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++)
+			memcpy(p + i * ETH_GSTRING_LEN,
+			       netvsc_stats[i].name, ETH_GSTRING_LEN);
 
+		p += i * ETH_GSTRING_LEN;
 		for (i = 0; i < nvdev->num_chn; i++) {
 			sprintf(p, "tx_queue_%u_packets", i);
 			p += ETH_GSTRING_LEN;
@@ -1495,17 +1428,10 @@  static rx_handler_result_t netvsc_vf_handle_frame(struct sk_buff **pskb)
 {
 	struct sk_buff *skb = *pskb;
 	struct net_device *ndev = rcu_dereference(skb->dev->rx_handler_data);
-	struct net_device_context *ndev_ctx = netdev_priv(ndev);
-	struct pcpu_sw_netstats *pcpu_stats
-		 = this_cpu_ptr(ndev_ctx->vf_stats);
 
 	skb->dev = ndev;
 
-	u64_stats_update_begin(&pcpu_stats->syncp);
-	pcpu_stats->rx_packets++;
-	pcpu_stats->rx_bytes += skb->len;
-	u64_stats_update_end(&pcpu_stats->syncp);
-
+	/* TODO: stats */
 	return RX_HANDLER_ANOTHER;
 }
 
@@ -1720,12 +1646,12 @@  static int netvsc_probe(struct hv_device *dev,
 	struct net_device_context *net_device_ctx;
 	struct netvsc_device_info device_info;
 	struct netvsc_device *nvdev;
-	int ret = -ENOMEM;
+	int ret;
 
 	net = alloc_etherdev_mq(sizeof(struct net_device_context),
 				VRSS_CHANNEL_MAX);
 	if (!net)
-		goto no_net;
+		return -ENOMEM;
 
 	netif_carrier_off(net);
 
@@ -1745,10 +1671,6 @@  static int netvsc_probe(struct hv_device *dev,
 	spin_lock_init(&net_device_ctx->lock);
 	INIT_LIST_HEAD(&net_device_ctx->reconfig_events);
 	INIT_WORK(&net_device_ctx->vf_takeover, netvsc_vf_setup);
-	net_device_ctx->vf_stats
-		= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
-	if (!net_device_ctx->vf_stats)
-		goto no_stats;
 
 	net->netdev_ops = &device_ops;
 	net->ethtool_ops = &ethtool_ops;
@@ -1768,9 +1690,10 @@  static int netvsc_probe(struct hv_device *dev,
 	if (IS_ERR(nvdev)) {
 		ret = PTR_ERR(nvdev);
 		netdev_err(net, "unable to add netvsc device (ret %d)\n", ret);
-		goto rndis_failed;
+		free_netdev(net);
+		hv_set_drvdata(dev, NULL);
+		return ret;
 	}
-
 	memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN);
 
 	/* hw_features computed in rndis_filter_device_add */
@@ -1794,20 +1717,11 @@  static int netvsc_probe(struct hv_device *dev,
 	ret = register_netdev(net);
 	if (ret != 0) {
 		pr_err("Unable to register netdev.\n");
-		goto register_failed;
+		rndis_filter_device_remove(dev, nvdev);
+		free_netdev(net);
 	}
 
 	return ret;
-
-register_failed:
-	rndis_filter_device_remove(dev, nvdev);
-rndis_failed:
-	free_percpu(net_device_ctx->vf_stats);
-no_stats:
-	hv_set_drvdata(dev, NULL);
-	free_netdev(net);
-no_net:
-	return ret;
 }
 
 static int netvsc_remove(struct hv_device *dev)
@@ -1840,7 +1754,6 @@  static int netvsc_remove(struct hv_device *dev)
 
 	hv_set_drvdata(dev, NULL);
 
-	free_percpu(ndev_ctx->vf_stats);
 	free_netdev(net);
 	return 0;
 }