[PATCH V2 2/4] net/bonding: fix non-terminable while loop

[Ferruh Yigit]

On 3/24/2022 3:00 AM, Min Hu (Connor) wrote:
> From: Huisong Li <lihuisong at huawei.com>
> 
> All slaves will be stopped and removed when closing a bonded port. But the
> while loop can not stop if both rte_eth_dev_stop and
> rte_eth_bond_slave_remove fail to run.
> 

Agree that this is a defect introduced in below commit. Thanks for the fix.

> Fixes: fb0379bc5db3 ("net/bonding: check stop call status")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Huisong Li <lihuisong at huawei.com>
> Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>
> ---
>   drivers/net/bonding/rte_eth_bond_pmd.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
> index 469dc71170..00d4deda44 100644
> --- a/drivers/net/bonding/rte_eth_bond_pmd.c
> +++ b/drivers/net/bonding/rte_eth_bond_pmd.c
> @@ -2149,13 +2149,14 @@ bond_ethdev_close(struct rte_eth_dev *dev)
>   		return 0;
>   
>   	RTE_BOND_LOG(INFO, "Closing bonded device %s", dev->device->name);
> -	while (internals->slave_count != skipped) {
> +	while (skipped < internals->slave_count) {

When below fixed with adding 'continue', no need to change the check, 
right? Although new one is also correct.

>   		uint16_t port_id = internals->slaves[skipped].port_id;
>   
>   		if (rte_eth_dev_stop(port_id) != 0) {
>   			RTE_BOND_LOG(ERR, "Failed to stop device on port %u",
>   				     port_id);
>   			skipped++;
> +			continue;

Can't we remove the slave even if 'stop()' failed? If so I think better 
to just log the error and keep continue in that case, what do you think?

>   		}
>   
>   		if (rte_eth_bond_slave_remove(bond_port_id, port_id) != 0) {