[PATCH 4/4] net/nfp: fix stop cpp service problem

[Kevin Traynor]

On 30/01/2024 12:07, Ferruh Yigit wrote:
> On 1/24/2024 9:25 AM, Chaoyong He wrote:
>> From: Long Wu <long.wu at corigine.com>
>>
>> Stop cpp service if all representors are closed and cpp service is running.
>>
>> Fixes: bab0e6f48b6d ("net/nfp: fix infinite loop")
>> Cc: chaoyong.he at corigine.com
>> Cc: stable at dpdk.org
>>
> 
> This fix is using a new function that is introduced in previous patches
> in this set, so this fix can't be backported.
> 
> Can you please change the order of the patches in this set, make this
> patch first patch in the set and update it to use old version of
> functions, so it can be backported?
> Later you can update old function with new one in the patch that
> introduces the new functions.
> 

Agree, it makes sense to put fixes at the start of the series to make
the backport easier. If it's not possible for some reason, then you can
also send a rebased revision of the fix to the stable mailing list with
the correct prefix
(http://doc.dpdk.org/guides/contributing/patches.html#backporting-patches-for-stable-releases)

> 
> Also instead of saying "cpp service problem" in the title, can you
> please describe the problem, I guess the problem you are referring is
> something like, "CPP service is consuming resources even there is no
> device remaining that requires it" ? Or is it something else?
> 

+1

>> Signed-off-by: Long Wu <long.wu at corigine.com>
>> Reviewed-by: Chaoyong He <chaoyong.he at corigine.com>
>> Reviewed-by: Peng Zhang <peng.zhang at corigine.com>
>> ---
>>  drivers/net/nfp/flower/nfp_flower_representor.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/net/nfp/flower/nfp_flower_representor.c b/drivers/net/nfp/flower/nfp_flower_representor.c
>> index bf67dc3ba2..2e8eb13e4e 100644
>> --- a/drivers/net/nfp/flower/nfp_flower_representor.c
>> +++ b/drivers/net/nfp/flower/nfp_flower_representor.c
>> @@ -400,6 +400,9 @@ nfp_flower_repr_dev_close(struct rte_eth_dev *dev)
>>  	/* Stop flower service first */
>>  	nfp_flower_service_stop(app_fw_flower);
>>  
>> +	/* Disable cpp service if need */
>> +	nfp_service_disable(&pf_dev->cpp_service_info);
>> +
>>  	/* Now it is safe to free all PF resources */
>>  	nfp_uninit_app_fw_flower(pf_dev);
>>  	nfp_pf_uninit(pf_dev);
>