From: Fuyun Liang <liangfuyun1@huawei.com>
Date: Sat, 10 Mar 2018 11:29:22 +0800
Subject: net: hns3: add existence check when remove old uc mac address
Patch-mainline: v4.17-rc1
Git-commit: 590980558bd0f49ff598909464661298aad74819
References: bsc#1104353 FATE#326415

When driver is in initial state, the mac_vlan table table is empty.
So the delete operation for mac address must fail. Existence check
is needed here. Otherwise, the error message will make user confused.

Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.h               |    3 +-
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c           |    4 +--
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c   |   17 +++++---------
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c    |    2 +
 drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c |   10 +++++---
 5 files changed, 20 insertions(+), 16 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
@@ -338,7 +338,8 @@ struct hnae3_ae_ops {
 				   u32 *tx_usecs_high, u32 *rx_usecs_high);
 
 	void (*get_mac_addr)(struct hnae3_handle *handle, u8 *p);
-	int (*set_mac_addr)(struct hnae3_handle *handle, void *p);
+	int (*set_mac_addr)(struct hnae3_handle *handle, void *p,
+			    bool is_first);
 	int (*add_uc_addr)(struct hnae3_handle *handle,
 			   const unsigned char *addr);
 	int (*rm_uc_addr)(struct hnae3_handle *handle,
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -1119,7 +1119,7 @@ static int hns3_nic_net_set_mac_address(
 	if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
 		return -EADDRNOTAVAIL;
 
-	ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data);
+	ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data, false);
 	if (ret) {
 		netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
 		return ret;
@@ -3026,7 +3026,7 @@ static void hns3_init_mac_addr(struct ne
 	}
 
 	if (h->ae_algo->ops->set_mac_addr)
-		h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr);
+		h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr, true);
 
 }
 
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -4378,7 +4378,8 @@ static void hclge_get_mac_addr(struct hn
 	ether_addr_copy(p, hdev->hw.mac.mac_addr);
 }
 
-static int hclge_set_mac_addr(struct hnae3_handle *handle, void *p)
+static int hclge_set_mac_addr(struct hnae3_handle *handle, void *p,
+			      bool is_first)
 {
 	const unsigned char *new_addr = (const unsigned char *)p;
 	struct hclge_vport *vport = hclge_get_vport(handle);
@@ -4395,11 +4396,9 @@ static int hclge_set_mac_addr(struct hna
 		return -EINVAL;
 	}
 
-	ret = hclge_rm_uc_addr(handle, hdev->hw.mac.mac_addr);
-	if (ret)
+	if (!is_first && hclge_rm_uc_addr(handle, hdev->hw.mac.mac_addr))
 		dev_warn(&hdev->pdev->dev,
-			 "remove old uc mac address fail, ret =%d.\n",
-			 ret);
+			 "remove old uc mac address fail.\n");
 
 	ret = hclge_add_uc_addr(handle, new_addr);
 	if (ret) {
@@ -4407,12 +4406,10 @@ static int hclge_set_mac_addr(struct hna
 			"add uc mac address fail, ret =%d.\n",
 			ret);
 
-		ret = hclge_add_uc_addr(handle, hdev->hw.mac.mac_addr);
-		if (ret) {
+		if (!is_first &&
+		    hclge_add_uc_addr(handle, hdev->hw.mac.mac_addr))
 			dev_err(&hdev->pdev->dev,
-				"restore uc mac address fail, ret =%d.\n",
-				ret);
-		}
+				"restore uc mac address fail.\n");
 
 		return -EIO;
 	}
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c
@@ -196,6 +196,8 @@ static int hclge_set_vf_uc_mac_addr(stru
 
 		hclge_rm_uc_addr_common(vport, old_addr);
 		status = hclge_add_uc_addr_common(vport, mac_addr);
+		if (status)
+			hclge_add_uc_addr_common(vport, old_addr);
 	} else if (mbx_req->msg[1] == HCLGE_MBX_MAC_VLAN_UC_ADD) {
 		status = hclge_add_uc_addr_common(vport, mac_addr);
 	} else if (mbx_req->msg[1] == HCLGE_MBX_MAC_VLAN_UC_REMOVE) {
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -734,20 +734,24 @@ static void hclgevf_get_mac_addr(struct
 	ether_addr_copy(p, hdev->hw.mac.mac_addr);
 }
 
-static int hclgevf_set_mac_addr(struct hnae3_handle *handle, void *p)
+static int hclgevf_set_mac_addr(struct hnae3_handle *handle, void *p,
+				bool is_first)
 {
 	struct hclgevf_dev *hdev = hclgevf_ae_get_hdev(handle);
 	u8 *old_mac_addr = (u8 *)hdev->hw.mac.mac_addr;
 	u8 *new_mac_addr = (u8 *)p;
 	u8 msg_data[ETH_ALEN * 2];
+	u16 subcode;
 	int status;
 
 	ether_addr_copy(msg_data, new_mac_addr);
 	ether_addr_copy(&msg_data[ETH_ALEN], old_mac_addr);
 
+	subcode = is_first ? HCLGE_MBX_MAC_VLAN_UC_ADD :
+			HCLGE_MBX_MAC_VLAN_UC_MODIFY;
+
 	status = hclgevf_send_mbx_msg(hdev, HCLGE_MBX_SET_UNICAST,
-				      HCLGE_MBX_MAC_VLAN_UC_MODIFY,
-				      msg_data, ETH_ALEN * 2,
+				      subcode, msg_data, ETH_ALEN * 2,
 				      false, NULL, 0);
 	if (!status)
 		ether_addr_copy(hdev->hw.mac.mac_addr, new_mac_addr);