diff options
| -rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 55 |
1 files changed, 16 insertions, 39 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 05ee870c3636..3aee4b68ff13 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -1839,44 +1839,18 @@ static int netvsc_register_vf(struct net_device *vf_netdev) netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); - /* Prevent this module from being unloaded while VF is registered */ - try_module_get(THIS_MODULE); - dev_hold(vf_netdev); rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev); return NOTIFY_OK; } -static int netvsc_vf_up(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; - - /* 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) +/* 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) @@ -1887,9 +1861,9 @@ static int netvsc_vf_down(struct net_device *vf_netdev) 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; } @@ -1908,10 +1882,11 @@ static int netvsc_unregister_vf(struct net_device *vf_netdev) netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); + netdev_rx_handler_unregister(vf_netdev); netdev_upper_dev_unlink(vf_netdev, ndev); RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL); dev_put(vf_netdev); - module_put(THIS_MODULE); + return NOTIFY_OK; } @@ -2015,11 +1990,11 @@ no_net: static int netvsc_remove(struct hv_device *dev) { - struct net_device *net; struct net_device_context *ndev_ctx; + struct net_device *vf_netdev; + struct net_device *net; net = hv_get_drvdata(dev); - if (net == NULL) { dev_err(&dev->device, "No net device to remove\n"); return 0; @@ -2036,12 +2011,15 @@ static int netvsc_remove(struct hv_device *dev) * removed. Also blocks mtu and channel changes. */ rtnl_lock(); + vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); + if (vf_netdev) + netvsc_unregister_vf(vf_netdev); + rndis_filter_device_remove(dev, rtnl_dereference(ndev_ctx->nvdev)); + unregister_netdevice(net); rtnl_unlock(); - unregister_netdev(net); - hv_set_drvdata(dev, NULL); free_percpu(ndev_ctx->vf_stats); @@ -2099,9 +2077,8 @@ 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; } |