From: Huazhong Tan <tanhuazhong@huawei.com>
Date: Wed, 7 Nov 2018 12:06:07 +0800
Subject: net: hns3: use HNS3_NIC_STATE_INITED to indicate the initialization
 state of enet
Patch-mainline: v5.0-rc1
Git-commit: 814da63c557726e60b06a206ec8c1123f176d392
References: bsc#1104353 FATE#326415

Besides of module_init and module_exit, the process of reset will
also uninitialize and initialize the enet client. When reset process
fails with enet client uninitialized, the module_exit does not need
to uninitialize the enet client, otherwise it may cause double
uninitialization problem.

So we need the HNS3_NIC_STATE_INITED flag to indicate whether
the enet client is initialized.

Also HNS3_NIC_STATE_REINITING is previously unused, so change it to
HNS3_NIC_STATE_INITED.

Fixes: bb6b94a896d4 ("net: hns3: Add reset interface implementation in client")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c |   17 +++++++++++++++++
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.h |    2 +-
 2 files changed, 18 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -3395,6 +3395,8 @@ static int hns3_client_init(struct hnae3
 	/* MTU range: (ETH_MIN_MTU(kernel default) - 9706) */
 	netdev->max_mtu = HNS3_MAX_MTU - (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
 
+	set_bit(HNS3_NIC_STATE_INITED, &priv->state);
+
 	return ret;
 
 out_reg_netdev_fail:
@@ -3421,6 +3423,11 @@ static void hns3_client_uninit(struct hn
 	if (netdev->reg_state != NETREG_UNINITIALIZED)
 		unregister_netdev(netdev);
 
+	if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
+		netdev_warn(netdev, "already uninitialized\n");
+		goto out_netdev_free;
+	}
+
 	hns3_del_all_fd_rules(netdev, true);
 
 	hns3_force_clear_all_rx_ring(handle);
@@ -3441,6 +3448,7 @@ static void hns3_client_uninit(struct hn
 
 	priv->ring_data = NULL;
 
+out_netdev_free:
 	free_netdev(netdev);
 }
 
@@ -3781,6 +3789,8 @@ static int hns3_reset_notify_init_enet(s
 		priv->ring_data = NULL;
 	}
 
+	set_bit(HNS3_NIC_STATE_INITED, &priv->state);
+
 	return ret;
 }
 
@@ -3791,6 +3801,11 @@ static int hns3_reset_notify_uninit_enet
 	struct hns3_nic_priv *priv = netdev_priv(netdev);
 	int ret;
 
+	if (!test_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
+		netdev_warn(netdev, "already uninitialized\n");
+		return 0;
+	}
+
 	hns3_force_clear_all_rx_ring(handle);
 
 	ret = hns3_nic_uninit_vector_data(priv);
@@ -3814,6 +3829,8 @@ static int hns3_reset_notify_uninit_enet
 		hns3_del_all_fd_rules(netdev, false);
 	}
 
+	clear_bit(HNS3_NIC_STATE_INITED, &priv->state);
+
 	return ret;
 }
 
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
@@ -15,7 +15,7 @@ extern const char hns3_driver_version[];
 enum hns3_nic_state {
 	HNS3_NIC_STATE_TESTING,
 	HNS3_NIC_STATE_RESETTING,
-	HNS3_NIC_STATE_REINITING,
+	HNS3_NIC_STATE_INITED,
 	HNS3_NIC_STATE_DOWN,
 	HNS3_NIC_STATE_DISABLED,
 	HNS3_NIC_STATE_REMOVING,