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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>, dev@dpdk.org
Cc: Thomas Monjalon <thomas@monjalon.net>,
	"techboard@dpdk.org" <techboard@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH] ethdev: unify error code if port ID is invalid
Date: Tue, 13 Oct 2020 17:12:38 +0100
Message-ID: <746882bb-79ee-a368-4dee-20846f4f9070@intel.com> (raw)
In-Reply-To: <236f87f5-c798-4d83-b821-abed61253191@oktetlabs.ru>

On 10/13/2020 4:39 PM, Andrew Rybchenko wrote:
> On 10/13/20 6:32 PM, Ferruh Yigit wrote:
>> On 10/13/2020 3:53 PM, Andrew Rybchenko wrote:
>>> Use ENODEV as the error code if specified port ID is invalid.
>>>
>>> Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
>>> ---
>>>    lib/librte_ethdev/rte_ethdev.c | 44 ++++++++++++++++----------------
>>>    lib/librte_ethdev/rte_ethdev.h | 46 +++++++++++++++++++++++-----------
>>>    2 files changed, 54 insertions(+), 36 deletions(-)
>>>
>>> diff --git a/lib/librte_ethdev/rte_ethdev.c
>>> b/lib/librte_ethdev/rte_ethdev.c
>>> index 5b7979a3b8..1f862f918a 100644
>>> --- a/lib/librte_ethdev/rte_ethdev.c
>>> +++ b/lib/librte_ethdev/rte_ethdev.c
>>> @@ -784,7 +784,7 @@ rte_eth_dev_get_name_by_port(uint16_t port_id,
>>> char *name)
>>>    {
>>>        char *tmp;
>>>    -    RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL);
>>> +    RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
>>
>> Thanks Andrew, +1 to this error unification.
>>
>> This will be API change without deprecation notice, cc'ed techboard for it.
> 
> Yes, thanks.
> 
>>
>> If this should (almost) always return '-ENODEV', does it make sense to
>> make another wrapper macro for it, to prevent later other error types
>> used again.
> 
> Unlikely, since most likely the line will be simply copied.
> RTE_ETH_VALID_PORTID_OR_ERR_RET will remain in any case, so
> it will be possible to misuse it anyway.
> 

Agree it won't prevent misuse completely but may help, anyway I don't have a 
strong opinion here, if you think that is not needed, that is OK.

>>
>> And there are a few instances returning '-1', are they left intentionally?
> 
> Yes. Inside ethdev it is either socket_id or fd in these cases.
> 

Can't those two also updated to return '-ENODEV' when 'port_id' is not valid?

  reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-13 14:53 Andrew Rybchenko
2020-10-13 15:32 ` Ferruh Yigit
2020-10-13 15:39   ` Andrew Rybchenko
2020-10-13 16:12     ` Ferruh Yigit [this message]
2020-10-14  6:16       ` Andrew Rybchenko
2020-10-14 16:01         ` Ferruh Yigit
2020-10-13 15:47   ` Thomas Monjalon
2020-10-16 12:05   ` Ferruh Yigit
2020-10-16 21:58     ` Ferruh Yigit
2020-10-16 23:43       ` Ferruh Yigit
2020-10-17  9:22         ` Thomas Monjalon

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