Re: [dpdk-dev] [PATCH 3/4] net/hns3: fix parse link fails code fail

[fengchengwen <fengchengwen@huawei.com>]

On 2021/4/26 20:50, Ferruh Yigit wrote:
> On 4/26/2021 1:41 PM, fengchengwen wrote:
>>
>>
>> On 2021/4/26 20:26, Ferruh Yigit wrote:
>>> On 4/22/2021 2:55 AM, Min Hu (Connor) wrote:
>>>> From: Chengwen Feng <fengchengwen@huawei.com>
>>>>
>>>> The link fails code should be parsed using the structure
>>>> hns3_mbx_vf_to_pf_cmd, else it will parse fail.
>>>>
>>>> Fixes: 109e4dd1bd7a ("net/hns3: get link state change through mailbox")
>>>> Cc: stable@dpdk.org
>>>>
>>>> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
>>>> Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
>>>> ---
>>>>  drivers/net/hns3/hns3_mbx.c | 5 +++--
>>>>  1 file changed, 3 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/drivers/net/hns3/hns3_mbx.c b/drivers/net/hns3/hns3_mbx.c
>>>> index ba04ac9..0550c9a 100644
>>>> --- a/drivers/net/hns3/hns3_mbx.c
>>>> +++ b/drivers/net/hns3/hns3_mbx.c
>>>> @@ -346,12 +346,13 @@ hns3_link_fail_parse(struct hns3_hw *hw, uint8_t link_fail_code)
>>>>  }
>>>>  
>>>>  static void
>>>> -hns3pf_handle_link_change_event(struct hns3_hw *hw,
>>>> -			      struct hns3_mbx_pf_to_vf_cmd *req)
>>>> +hns3pf_handle_link_change_event(struct hns3_hw *hw, void *data)
>>>
>>> Why not s/struct hns3_mbx_pf_to_vf_cmd/struct hns3_mbx_vf_to_pf_cmd/ but change
>>> to parameter to "void *", wouldn't it reduce the type check?
>>>
>>
>> Only this message needs to be converted using hns3_mbx_vf_to_pf_cmd.
>> All other messages are processed using hns3_mbx_pf_to_vf_cmd.
>> So here we simplifying fix it.
>>
> 
> There is a single caller of the function, which send parameter as "struct
> hns3_mbx_pf_to_vf_cmd *req", so what is the point of making the parameter as
> "void *" and inside the function cast it to "struct hns3_mbx_vf_to_pf_cmd *req =
> data;"?
> Instead of defining parameter as "struct hns3_mbx_pf_to_vf_cmd *req".
> 

We'll keep the original API interface and add comments in v2, thanks

>> Beside we will refactor hns3_mbx module in later version because the
>> PF and VF process logic is mixed.
>>
> 
> OK
> 
>> thanks
>>
>>>>  {
>>>>  #define LINK_STATUS_OFFSET     1
>>>>  #define LINK_FAIL_CODE_OFFSET  2
>>>>  
>>>> +	struct hns3_mbx_vf_to_pf_cmd *req = data;
>>>> +
>>>>  	if (!req->msg[LINK_STATUS_OFFSET])
>>>>  		hns3_link_fail_parse(hw, req->msg[LINK_FAIL_CODE_OFFSET]);
>>>>  
>>>>
>>>
>>>
>>> .
>>>
>>
> 
> 
> .
>