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From: David Marchand <david.marchand@redhat.com>
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
Date: Thu, 22 Oct 2020 14:51:54 +0200
Message-ID: <CAJFAV8zrzQpMs8PyOtk-7ShifSgBX8qURoE_p2SeKR2EREmEeQ@mail.gmail.com> (raw)
In-Reply-To: <0c755de289f228e67897818639a171cbf1d768ae.1603207676.git.wangyunjian@huawei.com>

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
>


-- 
David Marchand


  reply	other threads:[~2020-10-22 12:52 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-03  9:44 [dpdk-dev] [PATCH v4 0/3] fixes for device event wangyunjian
2020-07-03  9:46 ` [dpdk-dev] [PATCH v4 1/3] eal: fix memory leak when removing event_cb wangyunjian
2020-07-29 11:47   ` wangyunjian
2020-07-30  2:57     ` Jeff Guo
2020-07-03  9:46 ` [dpdk-dev] [PATCH v4 2/3] eal: return error code when failure wangyunjian
2020-07-03  9:46 ` [dpdk-dev] [PATCH v4 3/3] eal: fix a wrong returned value when callback exists wangyunjian
2020-10-20 13:18   ` [dpdk-dev] [dpdk-stable] " David Marchand
2020-10-20 14:31     ` wangyunjian
2020-09-03  3:33 ` [dpdk-dev] [PATCH v4 0/3] fixes for device event wangyunjian
2020-10-21 11:18 ` [dpdk-dev] [PATCH v5 " wangyunjian
2020-10-21 11:19   ` [dpdk-dev] [PATCH v5 1/3] eal: fix memory leak when removing event_cb wangyunjian
2020-10-21 11:19   ` [dpdk-dev] [PATCH v5 2/3] eal: return error code when failure wangyunjian
2020-10-22 12:51     ` David Marchand [this message]
2020-10-23  9:05       ` wangyunjian
2020-10-21 11:19   ` [dpdk-dev] [PATCH v5 3/3] eal: fix a wrong returned value when callback exists wangyunjian
2020-10-22 12:55     ` David Marchand
2020-10-23  9:05       ` wangyunjian
2020-10-23 11:37   ` [dpdk-dev] [PATCH v5 0/3] fixes for device event David Marchand

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