hv_netvsc: Add the support of hibernation (0efeea5f) · Commits · 戴 / test

drivers/net/hyperv/hyperv_net.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -952,6 +952,9 @@ struct net_device_context {
		u32 vf_alloc;
		/* Serial number of the VF to team with */
		u32 vf_serial;

		/* Used to temporarily save the config info across hibernation */
		struct netvsc_device_info *saved_netvsc_dev_info;
		};

		/* Per channel data */

+57 −0

Original line number	Diff line number	Diff line
		@@ -2421,6 +2421,61 @@ static int netvsc_remove(struct hv_device *dev)
		return 0;
		}

		static int netvsc_suspend(struct hv_device *dev)
		{
		struct net_device_context *ndev_ctx;
		struct net_device vf_netdev, net;
		struct netvsc_device *nvdev;
		int ret;

		net = hv_get_drvdata(dev);

		ndev_ctx = netdev_priv(net);
		cancel_delayed_work_sync(&ndev_ctx->dwork);

		rtnl_lock();

		nvdev = rtnl_dereference(ndev_ctx->nvdev);
		if (nvdev == NULL) {
		ret = -ENODEV;
		goto out;
		}

		vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev);
		if (vf_netdev)
		netvsc_unregister_vf(vf_netdev);

		/* Save the current config info */
		ndev_ctx->saved_netvsc_dev_info = netvsc_devinfo_get(nvdev);

		ret = netvsc_detach(net, nvdev);
		out:
		rtnl_unlock();

		return ret;
		}

		static int netvsc_resume(struct hv_device *dev)
		{
		struct net_device *net = hv_get_drvdata(dev);
		struct net_device_context *net_device_ctx;
		struct netvsc_device_info *device_info;
		int ret;

		rtnl_lock();

		net_device_ctx = netdev_priv(net);
		device_info = net_device_ctx->saved_netvsc_dev_info;

		ret = netvsc_attach(net, device_info);

		rtnl_unlock();

		kfree(device_info);
		net_device_ctx->saved_netvsc_dev_info = NULL;

		return ret;
		}
		static const struct hv_vmbus_device_id id_table[] = {
		/* Network guid */
		{ HV_NIC_GUID, },
		@@ -2435,6 +2490,8 @@ static struct hv_driver netvsc_drv = {
		.id_table = id_table,
		.probe = netvsc_probe,
		.remove = netvsc_remove,
		.suspend = netvsc_suspend,
		.resume = netvsc_resume,
		.driver = {
		.probe_type = PROBE_FORCE_SYNCHRONOUS,
		},