Re: [dpdk-dev] [PATCH 2/3] net/bonding: fix not checked return value

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

在 2021/7/8 21:20, Havlík Martin 写道:
> Dne 2021-07-08 14:43, Min Hu (Connor) napsal:
>> 在 2021/6/22 17:25, Martin Havlik 写道:
>>> Return value from bond_ethdev_8023ad_flow_set() is now checked
>>> and appropriate message is logged on error.
>>>
>>> Fixes: 112891cd27e5 ("net/bonding: add dedicated HW queues for LACP 
>>> control")
>>> Cc: tomaszx.kulasek@intel.com
>>>
>>> Signed-off-by: Martin Havlik <xhavli56@stud.fit.vutbr.cz>
>>> Cc: Jan Viktorin <viktorin@cesnet.cz>
>>> ---
>>>   drivers/net/bonding/rte_eth_bond_pmd.c | 8 +++++++-
>>>   1 file changed, 7 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c 
>>> b/drivers/net/bonding/rte_eth_bond_pmd.c
>>> index 4c43bf916..a6755661c 100644
>>> --- a/drivers/net/bonding/rte_eth_bond_pmd.c
>>> +++ b/drivers/net/bonding/rte_eth_bond_pmd.c
>>> @@ -1819,8 +1819,14 @@ slave_configure(struct rte_eth_dev 
>>> *bonded_eth_dev,
>>>                     
>>> internals->mode4.dedicated_queues.flow[slave_eth_dev->data->port_id],
>>>                       &flow_error);
>>>   -        bond_ethdev_8023ad_flow_set(bonded_eth_dev,
>>> +        errval = bond_ethdev_8023ad_flow_set(bonded_eth_dev,
>>>                   slave_eth_dev->data->port_id);
>>> +        if (errval != 0) {
>>> +            RTE_BOND_LOG(ERR,
>>> +                "bond_ethdev_8023ad_flow_set: port=%d, err (%d)",
>>> +                slave_eth_dev->data->port_id, errval);
>>> +            return errval;
>>> +        }
>>>       }
>>>
>> Firstly, I think your patch is OK,
>> But I want to know what is your standard to decide which function
>> should check return value or not(of course, they are none-void)?
>>
> I encountered the problem with dedicated queues on mlx5, I looked into 
> the source code and I saw the cause, so I fixed it. If I had seen any 
> other issue, I would've fixed it too. That, for example, applies to the 
> log message fix I included. My standard is to check all non-void return 
> values.
Got it.
>> While, I noticed "bond_ethdev_lsc_event_callback" nearby was not
>> checked, but you ignored it.
>>
> Not ignored, just didn't properly review more code than what closely 
> surrounded the problematic lines.
>>>       /* Start device */
>>>
Acked by: Min Hu (Connor) <humin29@huawei.com>
> .