netvsc: cleanup datapath switch

Use one routine for datapath up/down. Don't need to reopen
the rndis layer.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 05ee870..b54b5b9 100644 (file)
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -1847,11 +1847,13 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
        return NOTIFY_OK;
 }
 
-static int netvsc_vf_up(struct net_device *vf_netdev)
+/* VF up/down change detected, schedule to change data path */
+static int netvsc_vf_changed(struct net_device *vf_netdev)
 {
        struct net_device_context *net_device_ctx;
        struct netvsc_device *netvsc_dev;
        struct net_device *ndev;
+       bool vf_is_up = netif_running(vf_netdev);
 
        ndev = get_netvsc_byref(vf_netdev);
        if (!ndev)
@@ -1862,34 +1864,9 @@ static int netvsc_vf_up(struct net_device *vf_netdev)
        if (!netvsc_dev)
                return NOTIFY_DONE;
 
-       /* Bump refcount when datapath is acvive - Why? */
-       rndis_filter_open(netvsc_dev);
-
-       /* notify the host to switch the data path. */
-       netvsc_switch_datapath(ndev, true);
-       netdev_info(ndev, "Data path switched to VF: %s\n", vf_netdev->name);
-
-       return NOTIFY_OK;
-}
-
-static int netvsc_vf_down(struct net_device *vf_netdev)
-{
-       struct net_device_context *net_device_ctx;
-       struct netvsc_device *netvsc_dev;
-       struct net_device *ndev;
-
-       ndev = get_netvsc_byref(vf_netdev);
-       if (!ndev)
-               return NOTIFY_DONE;
-
-       net_device_ctx = netdev_priv(ndev);
-       netvsc_dev = rtnl_dereference(net_device_ctx->nvdev);
-       if (!netvsc_dev)
-               return NOTIFY_DONE;
-
-       netvsc_switch_datapath(ndev, false);
-       netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name);
-       rndis_filter_close(netvsc_dev);
+       netvsc_switch_datapath(ndev, vf_is_up);
+       netdev_info(ndev, "Data path switched %s VF: %s\n",
+                   vf_is_up ? "to" : "from", vf_netdev->name);
 
        return NOTIFY_OK;
 }
@@ -2099,9 +2076,8 @@ static int netvsc_netdev_event(struct notifier_block *this,
        case NETDEV_UNREGISTER:
                return netvsc_unregister_vf(event_dev);
        case NETDEV_UP:
-               return netvsc_vf_up(event_dev);
        case NETDEV_DOWN:
-               return netvsc_vf_down(event_dev);
+               return netvsc_vf_changed(event_dev);
        default:
                return NOTIFY_DONE;
        }