[dpdk-dev] [PATCH 1/8] net/hns3: fix residual MAC address entry

["Min Hu (Connor)" <humin29@huawei.com>]

From: Chengchang Tang <tangchengchang@huawei.com>

Currently, even if we fail to remove the origin MAC address from the HW,
the set_default_mac will go on, and add the new MAC address to the HW.
Eventually cause the original MAC address entry to remain in the HW, and
users may receive unexpected packets.

This patch make set_default_mac return directly to failure if deleting
the original MAC address fails, simplifying the behavior of the driver
and solving the problem of residual MAC address entry.

Fixes: 7d7f9f80bbfb ("net/hns3: support MAC address related operations")
Cc: stable@dpdk.org

Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 17b995a..3699b56 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -1748,7 +1748,6 @@ hns3_set_default_mac_addr(struct rte_eth_dev *dev,
 	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;
 
 	/*
@@ -1768,9 +1767,10 @@ hns3_set_default_mac_addr(struct rte_eth_dev *dev,
 					      oaddr);
 			hns3_warn(hw, "Remove old uc mac address(%s) fail: %d",
 				  mac_str, ret);
-			rm_succes = false;
-		} else
-			rm_succes = true;
+
+			rte_spinlock_unlock(&hw->lock);
+			return ret;
+		}
 	}
 
 	ret = hns3_add_uc_addr_common(hw, mac_addr);
@@ -1805,16 +1805,12 @@ 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) {
-			hns3_ether_format_addr(mac_str, RTE_ETHER_ADDR_FMT_SIZE,
-					      oaddr);
-			hns3_warn(hw,
-				  "Failed to restore old uc mac addr(%s): %d",
+	ret_val = hns3_add_uc_addr_common(hw, oaddr);
+	if (ret_val) {
+		hns3_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;
-		}
+		hw->mac.default_addr_setted = false;
 	}
 	rte_spinlock_unlock(&hw->lock);
 
-- 
2.7.4