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From: Tyler Retzlaff <roretzla@linux.microsoft.com>
To: eagostini@nvidia.com
Cc: dev@dpdk.org
Subject: Re: [PATCH v1] gpudev: return EINVAL if invalid input pointer for free and unregister
Date: Thu, 18 Nov 2021 12:19:31 -0800
Message-ID: <20211118201931.GA6492@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net> (raw)
In-Reply-To: <20211118192802.23955-1-eagostini@nvidia.com>

On Thu, Nov 18, 2021 at 07:28:02PM +0000, eagostini@nvidia.com wrote:
> From: Elena Agostini <eagostini@nvidia.com>
> 
> Signed-off-by: Elena Agostini <eagostini@nvidia.com>
> ---
>  lib/gpudev/gpudev.c     | 10 ++++++++++
>  lib/gpudev/rte_gpudev.h |  2 ++
>  2 files changed, 12 insertions(+)
> 
> diff --git a/lib/gpudev/gpudev.c b/lib/gpudev/gpudev.c
> index 2b174d8bd5..97575ed979 100644
> --- a/lib/gpudev/gpudev.c
> +++ b/lib/gpudev/gpudev.c
> @@ -576,6 +576,11 @@ rte_gpu_mem_free(int16_t dev_id, void *ptr)
>  		return -rte_errno;
>  	}
>  
> +	if (ptr == NULL) {
> +		rte_errno = EINVAL;
> +		return -rte_errno;
> +	}

in general dpdk has real problems with how it indicates that an error
occurred and what error occurred consistently.

some api's return 0 on success
  and maybe return -errno if ! 0
  and maybe return errno if ! 0
  and maybe set rte_errno if ! 0

some api's return -1 on failure
  and set rte_errno if -1

some api's return < 0 on failure
  and maybe set rte_errno
  and maybe return -errno
  and maybe set rte_errno and return -rte_errno

this isn't isiolated to only this change but since additions and context
in this patch highlight it maybe it's a good time to bring it up.

it's frustrating to have to carefully read the implementation every time
you want to make a function call to make sure you're handling the flavor
of error reporting for a particular function.

if this is new code could we please clearly identify the current best
practice and follow it as a standard going forward for all new public
apis.

thanks!

  parent reply	other threads:[~2021-11-18 20:19 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-18 19:28 eagostini
2021-11-18 16:20 ` Stephen Hemminger
2021-11-18 16:22   ` Elena Agostini
2021-11-18 20:19 ` Tyler Retzlaff [this message]
2021-11-19  9:34   ` Ferruh Yigit
2021-11-19  9:56     ` Thomas Monjalon
2021-11-24 17:24       ` Tyler Retzlaff
2021-11-24 18:04         ` Bruce Richardson
2021-12-01 21:37           ` Tyler Retzlaff
2021-12-02  7:18             ` Thomas Monjalon
2021-12-02 12:33               ` Morten Brørup
2021-12-02 13:01                 ` Ananyev, Konstantin
2021-12-02 13:56                   ` Morten Brørup
2021-12-03 10:37                     ` Morten Brørup
2021-12-08 17:34                       ` Tyler Retzlaff
2021-12-08 18:40                         ` Morten Brørup
2021-12-09 19:43                           ` Tyler Retzlaff
2021-12-08 17:27                   ` Tyler Retzlaff
2021-11-19 10:15     ` Bruce Richardson
2021-11-18 20:33 ` [PATCH v2] gpudev: free and unregister return gracefully if input pointer is NULL eagostini
2021-11-22 18:24   ` [PATCH v3] gpudev: manage NULL pointer eagostini
2021-11-22 11:23     ` Thomas Monjalon
2021-11-22 11:34       ` Elena Agostini
2021-11-22 11:51         ` Thomas Monjalon
2021-11-22 23:52 ` [PATCH v4] " eagostini
2021-11-22 23:55 ` [PATCH v5] " eagostini
2021-11-22 16:01   ` Thomas Monjalon
2021-11-23  0:15 ` [PATCH v6] " eagostini
2021-11-23  0:42 ` [PATCH v7] " eagostini
2021-11-24  8:40   ` Thomas Monjalon

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