[PATCH v1 2/6] net/zxdh: fix issues related to MAC configuration

[Stephen Hemminger]

On Mon,  7 Jul 2025 13:56:17 +0800
Junlong Wang <wang.junlong1 at zte.com.cn> wrote:

> Fix error handling when MAC configuration fails.
> This is issue was discovered during internal testing.
> 
> Fixes: 1c8f68b64cfc ("net/zxdh: optimize MAC operations")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Junlong Wang <wang.junlong1 at zte.com.cn>
> ---
>  drivers/net/zxdh/zxdh_ethdev.c     | 15 +++++++++++
>  drivers/net/zxdh/zxdh_ethdev_ops.c | 34 +++++++++++++++++++-----
>  drivers/net/zxdh/zxdh_msg.c        | 10 +++----
>  drivers/net/zxdh/zxdh_tables.c     | 42 ++++++++++++++++--------------
>  4 files changed, 69 insertions(+), 32 deletions(-)
> 
> diff --git a/drivers/net/zxdh/zxdh_ethdev.c b/drivers/net/zxdh/zxdh_ethdev.c
> index 80053678cb..8996d86b90 100644
> --- a/drivers/net/zxdh/zxdh_ethdev.c
> +++ b/drivers/net/zxdh/zxdh_ethdev.c
> @@ -1265,6 +1265,7 @@ static int
>  zxdh_mac_config(struct rte_eth_dev *eth_dev)
>  {
>  	struct zxdh_hw *hw = eth_dev->data->dev_private;
> +	struct zxdh_msg_info msg_info = {0};
>  	int ret = 0;
>  
>  	if (hw->is_pf) {
> @@ -1274,7 +1275,21 @@ zxdh_mac_config(struct rte_eth_dev *eth_dev)
>  			PMD_DRV_LOG(ERR, "Failed to add mac: port 0x%x", hw->vport.vport);
>  			return ret;
>  		}
> +		hw->uc_num++;
> +	} else {
> +		struct zxdh_mac_filter *mac_filter = &msg_info.data.mac_filter_msg;
> +		mac_filter->filter_flag = 0xff;
> +		memcpy(&mac_filter->mac, &eth_dev->data->mac_addrs[0],
> +				sizeof(eth_dev->data->mac_addrs[0]));

Since mac_filter->mac and eth_dev->data->mac_addrs are both of same type (rte_ether_addr),
using structure assignment operation instead of memcpy is preferred. Assignment assures
that types are the same. 
	mac_filter->mac = eth_dev->data->mac_addrs;