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From: Bruce Richardson <bruce.richardson@intel.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>
Cc: Tyler Retzlaff <roretzla@linux.microsoft.com>,
	eagostini@nvidia.com, dev@dpdk.org,
	"techboard@dpdk.org" <techboard@dpdk.org>,
	Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>,
	David Marchand <david.marchand@redhat.com>
Subject: Re: [PATCH v1] gpudev: return EINVAL if invalid input pointer for free and unregister
Date: Fri, 19 Nov 2021 10:15:32 +0000	[thread overview]
Message-ID: <YZd5RBViEP/myWJA@bricha3-MOBL.ger.corp.intel.com> (raw)
In-Reply-To: <d6fadeca-e3e2-a83e-a46e-bed87caf39e8@intel.com>

On Fri, Nov 19, 2021 at 09:34:08AM +0000, Ferruh Yigit wrote:
> On 11/18/2021 8:19 PM, Tyler Retzlaff wrote:
> > 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 is a generic comment, cc'ed a few more folks to make the comment more
> visible.
>

Yes, it's inconsistent. However, this only applies to functions which
return integer values. Other functions which return pointer values are
hopefully standardized to return NULL on error. [Which means any error code
must be in rte_errno.]

/Bruce

  parent reply	other threads:[~2021-11-19 10:15 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
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 [this message]
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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