Commit 891de74d authored by Haiyang Zhang's avatar Haiyang Zhang Committed by David S. Miller
Browse files

hyperv: Fix the carrier status setting 



Without this patch, the "cat /sys/class/net/ethN/operstate" shows
"unknown", and "ethtool ethN" shows "Link detected: yes", when VM
boots up with or without vNIC connected.

This patch fixed the problem.

Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 09db3080

drivers/net/hyperv/netvsc_drv.c

+38 −15
Original line number Diff line number Diff line
@@ -88,8 +88,12 @@ static int netvsc_open(struct net_device *net) 
{

	struct net_device_context *net_device_ctx = netdev_priv(net);

	struct hv_device *device_obj = net_device_ctx->device_ctx;

	struct netvsc_device *nvdev;

	struct rndis_device *rdev;

	int ret = 0;



	netif_carrier_off(net);



	/* Open up the device */

	ret = rndis_filter_open(device_obj);

	if (ret != 0) {
@@ -99,6 +103,11 @@ static int netvsc_open(struct net_device *net) 


	netif_start_queue(net);



	nvdev = hv_get_drvdata(device_obj);

	rdev = nvdev->extension;

	if (!rdev->link_state)

		netif_carrier_on(net);



	return ret;

}
@@ -229,23 +238,24 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj, 
	struct net_device *net;

	struct net_device_context *ndev_ctx;

	struct netvsc_device *net_device;

	struct rndis_device *rdev;



	net_device = hv_get_drvdata(device_obj);

	rdev = net_device->extension;



	rdev->link_state = status != 1;



	net = net_device->ndev;



	if (!net) {

		netdev_err(net, "got link status but net device "

				"not initialized yet\n");

	if (!net || net->reg_state != NETREG_REGISTERED)

		return;

	}



	if (status == 1) {

		netif_carrier_on(net);

	ndev_ctx = netdev_priv(net);

	if (status == 1) {

		schedule_delayed_work(&ndev_ctx->dwork, 0);

		schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20));

	} else {

		netif_carrier_off(net);

		schedule_delayed_work(&ndev_ctx->dwork, 0);

	}

}
@@ -388,16 +398,34 @@ static const struct net_device_ops device_ops = { 
 * current context when receiving RNDIS_STATUS_MEDIA_CONNECT event. So, add

 * another netif_notify_peers() into a delayed work, otherwise GARP packet

 * will not be sent after quick migration, and cause network disconnection.

 * Also, we update the carrier status here.

 */

static void netvsc_send_garp(struct work_struct *w)

static void netvsc_link_change(struct work_struct *w)

{

	struct net_device_context *ndev_ctx;

	struct net_device *net;

	struct netvsc_device *net_device;

	struct rndis_device *rdev;

	bool notify;



	rtnl_lock();



	ndev_ctx = container_of(w, struct net_device_context, dwork.work);

	net_device = hv_get_drvdata(ndev_ctx->device_ctx);

	rdev = net_device->extension;

	net = net_device->ndev;



	if (rdev->link_state) {

		netif_carrier_off(net);

		notify = false;

	} else {

		netif_carrier_on(net);

		notify = true;

	}



	rtnl_unlock();



	if (notify)

		netdev_notify_peers(net);

}
@@ -414,13 +442,10 @@ static int netvsc_probe(struct hv_device *dev, 
	if (!net)

		return -ENOMEM;



	/* Set initial state */

	netif_carrier_off(net);



	net_device_ctx = netdev_priv(net);

	net_device_ctx->device_ctx = dev;

	hv_set_drvdata(dev, net);

	INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_send_garp);

	INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change);

	INIT_WORK(&net_device_ctx->work, do_set_multicast);



	net->netdev_ops = &device_ops;
@@ -443,8 +468,6 @@ static int netvsc_probe(struct hv_device *dev, 
	}

	memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN);



	netif_carrier_on(net);



	ret = register_netdev(net);

	if (ret != 0) {

		pr_err("Unable to register netdev.\n");

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