[v5,2/3] eal: return error code when failure
Checks
Commit Message
From: Yunjian Wang <wangyunjian@huawei.com>
Fix return value, using -EAGAIN instead of 0 when the callback is busy
and using -ENOENT instead of 0 when the callback is not found.
Fixes: a753e53d517b ("eal: add device event monitor framework")
Cc: stable@dpdk.org
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Acked-by: Jeff Guo <jia.guo@intel.com>
---
lib/librte_eal/common/eal_common_dev.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
Comments
On Wed, Oct 21, 2020 at 1:19 PM wangyunjian <wangyunjian@huawei.com> wrote:
>
> From: Yunjian Wang <wangyunjian@huawei.com>
>
> Fix return value, using -EAGAIN instead of 0 when the callback is busy
> and using -ENOENT instead of 0 when the callback is not found.
>
> Fixes: a753e53d517b ("eal: add device event monitor framework")
> Cc: stable@dpdk.org
This API is experimental, its description is vague enough and we can
change it in the current release.
But I see this as a change in behavior for existing users, not a fix
and I would not backport it.
Opinions?
>
> Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> Acked-by: Jeff Guo <jia.guo@intel.com>
> ---
> lib/librte_eal/common/eal_common_dev.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
> index 363a2ca95e..d990bfd20d 100644
> --- a/lib/librte_eal/common/eal_common_dev.c
> +++ b/lib/librte_eal/common/eal_common_dev.c
> @@ -530,9 +530,15 @@ rte_dev_event_callback_unregister(const char *device_name,
> free(event_cb);
> ret++;
> } else {
> - continue;
> + ret = -EAGAIN;
> + break;
> }
> }
> +
> + /* this callback is not be registered */
> + if (ret == 0)
> + ret = -ENOENT;
> +
> rte_spinlock_unlock(&dev_event_lock);
> return ret;
> }
> --
> 2.23.0
>
> -----Original Message-----
> From: David Marchand [mailto:david.marchand@redhat.com]
> Sent: Thursday, October 22, 2020 8:52 PM
> To: wangyunjian <wangyunjian@huawei.com>
> Cc: dev <dev@dpdk.org>; Jeff Guo <jia.guo@intel.com>; Jerin Jacob
> Kollanukkaran <jerinj@marvell.com>; Lilijun (Jerry) <jerry.lilijun@huawei.com>;
> xudingke <xudingke@huawei.com>; dpdk stable <stable@dpdk.org>; Kevin
> Traynor <ktraynor@redhat.com>; Luca Boccassi <bluca@debian.org>
> Subject: Re: [dpdk-dev] [PATCH v5 2/3] eal: return error code when failure
>
> On Wed, Oct 21, 2020 at 1:19 PM wangyunjian <wangyunjian@huawei.com>
> wrote:
> >
> > From: Yunjian Wang <wangyunjian@huawei.com>
> >
> > Fix return value, using -EAGAIN instead of 0 when the callback is busy
> > and using -ENOENT instead of 0 when the callback is not found.
> >
> > Fixes: a753e53d517b ("eal: add device event monitor framework")
> > Cc: stable@dpdk.org
>
> This API is experimental, its description is vague enough and we can change it
> in the current release.
> But I see this as a change in behavior for existing users, not a fix and I would
> not backport it.
>
> Opinions?
Agree, not backport it.
Yunjian
>
>
> >
> > Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> > Acked-by: Jeff Guo <jia.guo@intel.com>
> > ---
> > lib/librte_eal/common/eal_common_dev.c | 8 +++++++-
> > 1 file changed, 7 insertions(+), 1 deletion(-)
> >
> > diff --git a/lib/librte_eal/common/eal_common_dev.c
> > b/lib/librte_eal/common/eal_common_dev.c
> > index 363a2ca95e..d990bfd20d 100644
> > --- a/lib/librte_eal/common/eal_common_dev.c
> > +++ b/lib/librte_eal/common/eal_common_dev.c
> > @@ -530,9 +530,15 @@ rte_dev_event_callback_unregister(const char
> *device_name,
> > free(event_cb);
> > ret++;
> > } else {
> > - continue;
> > + ret = -EAGAIN;
> > + break;
> > }
> > }
> > +
> > + /* this callback is not be registered */
> > + if (ret == 0)
> > + ret = -ENOENT;
> > +
> > rte_spinlock_unlock(&dev_event_lock);
> > return ret;
> > }
> > --
> > 2.23.0
> >
>
>
> --
> David Marchand
@@ -530,9 +530,15 @@ rte_dev_event_callback_unregister(const char *device_name,
free(event_cb);
ret++;
} else {
- continue;
+ ret = -EAGAIN;
+ break;
}
}
+
+ /* this callback is not be registered */
+ if (ret == 0)
+ ret = -ENOENT;
+
rte_spinlock_unlock(&dev_event_lock);
return ret;
}