[PATCH 19.11 1/4] net/hns3: fix residual MAC after setting default MAC

[Huisong Li]

[ upstream commit 19e67d8ebced5cb12829f75c70e6c497b5925e82 ]

This problem occurs in the following scenarios:
1) reset is encountered when the adapter is running.
2) set a new default MAC address.

After the above two steps, the old default MAC address should be not
take effect. But the current behavior is contrary to that. This is due
to the change of the "default_addr_setted" in hw->mac from 'true' to
'false' after the reset. As a result, the old MAC address is not removed
when the new default MAC address is set. This variable controls whether
to delete the old default MAC address when setting the default MAC
address. It is only used when the mac_addr_set API is called for the
first time. In fact, when a unicast MAC address is deleted, if the
address isn't in the MAC address table, the driver doesn't return
failure. So this patch remove the redundant and troublesome variables to
resolve this problem.

Fixes: 7d7f9f80bbfb ("net/hns3: support MAC address related operations")

Signed-off-by: Huisong Li <lihuisong at huawei.com>
Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c | 58 ++++++++++------------------------
 drivers/net/hns3/hns3_ethdev.h |  1 -
 2 files changed, 16 insertions(+), 43 deletions(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 157dd34d4f..a2676f84b0 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -1545,7 +1545,7 @@ hns3_remove_mc_addr_common(struct hns3_hw *hw, struct rte_ether_addr *mac_addr)
 
 static int
 hns3_add_mac_addr(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
-		  uint32_t idx, __attribute__ ((unused)) uint32_t pool)
+		  __rte_unused uint32_t idx, __rte_unused uint32_t pool)
 {
 	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	char mac_str[RTE_ETHER_ADDR_FMT_SIZE];
@@ -1576,8 +1576,6 @@ hns3_add_mac_addr(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
 		return ret;
 	}
 
-	if (idx == 0)
-		hw->mac.default_addr_setted = true;
 	rte_spinlock_unlock(&hw->lock);
 
 	return ret;
@@ -1642,35 +1640,18 @@ hns3_set_default_mac_addr(struct rte_eth_dev *dev,
 	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	struct rte_ether_addr *oaddr;
 	char mac_str[RTE_ETHER_ADDR_FMT_SIZE];
-	bool default_addr_setted;
-	bool rm_succes = false;
 	int ret, ret_val;
 
-	/* check if mac addr is valid */
-	if (!rte_is_valid_assigned_ether_addr(mac_addr)) {
-		rte_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
-				      mac_addr);
-		hns3_err(hw, "Failed to set mac addr, addr(%s) invalid",
-			 mac_str);
-		return -EINVAL;
-	}
-
-	oaddr = (struct rte_ether_addr *)hw->mac.mac_addr;
-	default_addr_setted = hw->mac.default_addr_setted;
-	if (default_addr_setted && !!rte_is_same_ether_addr(mac_addr, oaddr))
-		return 0;
-
 	rte_spinlock_lock(&hw->lock);
-	if (default_addr_setted) {
-		ret = hns3_remove_uc_addr_common(hw, oaddr);
-		if (ret) {
-			rte_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
-					      oaddr);
-			hns3_warn(hw, "Remove old uc mac address(%s) fail: %d",
-				  mac_str, ret);
-			rm_succes = false;
-		} else
-			rm_succes = true;
+	oaddr = (struct rte_ether_addr *)hw->mac.mac_addr;
+	ret = hns3_remove_uc_addr_common(hw, oaddr);
+	if (ret) {
+		rte_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
+					oaddr);
+		hns3_warn(hw, "Remove old uc mac address(%s) fail: %d",
+				mac_str, ret);
+		rte_spinlock_unlock(&hw->lock);
+		return ret;
 	}
 
 	ret = hns3_add_uc_addr_common(hw, mac_addr);
@@ -1689,7 +1670,6 @@ hns3_set_default_mac_addr(struct rte_eth_dev *dev,
 
 	rte_ether_addr_copy(mac_addr,
 			    (struct rte_ether_addr *)hw->mac.mac_addr);
-	hw->mac.default_addr_setted = true;
 	rte_spinlock_unlock(&hw->lock);
 
 	return 0;
@@ -1705,16 +1685,12 @@ hns3_set_default_mac_addr(struct rte_eth_dev *dev,
 	}
 
 err_add_uc_addr:
-	if (rm_succes) {
-		ret_val = hns3_add_uc_addr_common(hw, oaddr);
-		if (ret_val) {
-			rte_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
-					      oaddr);
-			hns3_warn(hw,
-				  "Failed to restore old uc mac addr(%s): %d",
-				  mac_str, ret_val);
-			hw->mac.default_addr_setted = false;
-		}
+	ret_val = hns3_add_uc_addr_common(hw, oaddr);
+	if (ret_val) {
+		rte_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
+					oaddr);
+		hns3_warn(hw, "Failed to restore old uc mac addr(%s): %d",
+				mac_str, ret_val);
 	}
 	rte_spinlock_unlock(&hw->lock);
 
@@ -2880,7 +2856,6 @@ hns3_get_board_configuration(struct hns3_hw *hw)
 	hw->rss_dis_flag = false;
 	memcpy(hw->mac.mac_addr, cfg.mac_addr, RTE_ETHER_ADDR_LEN);
 	hw->mac.phy_addr = cfg.phy_addr;
-	hw->mac.default_addr_setted = false;
 	hw->num_tx_desc = cfg.tqp_desc_num;
 	hw->num_rx_desc = cfg.tqp_desc_num;
 	hw->dcb_info.num_pg = 1;
@@ -4699,7 +4674,6 @@ hns3_do_stop(struct hns3_adapter *hns)
 		reset_queue = true;
 	} else
 		reset_queue = false;
-	hw->mac.default_addr_setted = false;
 	return hns3_stop_queues(hns, reset_queue);
 }
 
diff --git a/drivers/net/hns3/hns3_ethdev.h b/drivers/net/hns3/hns3_ethdev.h
index 6c3ac6f8a9..be0fac4fd2 100644
--- a/drivers/net/hns3/hns3_ethdev.h
+++ b/drivers/net/hns3/hns3_ethdev.h
@@ -144,7 +144,6 @@ enum hns3_media_type {
 
 struct hns3_mac {
 	uint8_t mac_addr[RTE_ETHER_ADDR_LEN];
-	bool default_addr_setted; /* whether default addr(mac_addr) is set */
 	uint8_t media_type;
 	uint8_t phy_addr;
 	uint8_t link_duplex  : 1; /* ETH_LINK_[HALF/FULL]_DUPLEX */
-- 
2.33.0