From: Bruce Richardson <bruce.richardson@intel.com>
To: Jingjing Wu <jingjing.wu@intel.com>
Cc: helin.zhang@intel.com, dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] i40evf: fix return value if command fails
Date: Fri, 6 May 2016 16:13:31 +0100 [thread overview]
Message-ID: <20160506151331.GG8880@bricha3-MOBL3> (raw)
In-Reply-To: <1462429374-17620-1-git-send-email-jingjing.wu@intel.com>
On Thu, May 05, 2016 at 02:22:54PM +0800, Jingjing Wu wrote:
> Previously, if message is sent successfully, but no response is
> received, function "i40evf_execute_vf_cmd" will return without error.
> The root cause is value "err" is overwritten. This patch fixes it.
>
> Fixes: ae19955e7c86 ("i40evf: support reporting PF reset")
> Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
> ---
> drivers/net/i40e/i40e_ethdev_vf.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
> index 2bce69b..9380019 100644
> --- a/drivers/net/i40e/i40e_ethdev_vf.c
> +++ b/drivers/net/i40e/i40e_ethdev_vf.c
> @@ -327,8 +327,7 @@ i40evf_execute_vf_cmd(struct rte_eth_dev *dev, struct vf_cmd_info *args)
> struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
> struct i40evf_arq_msg_info info;
> enum i40evf_aq_result ret;
> - int err = -1;
> - int i = 0;
> + int err, i = 0;
>
> if (_atomic_set_cmd(vf, args->ops))
> return -1;
> @@ -346,6 +345,7 @@ i40evf_execute_vf_cmd(struct rte_eth_dev *dev, struct vf_cmd_info *args)
> return err;
> }
>
> + err = -1;
> switch (args->ops) {
> case I40E_VIRTCHNL_OP_RESET_VF:
> /*no need to process in this function */
Hi Jingjing,
this patch changes this return value in this case (I40E_VIRTCHNL_OP_RESET_VF).
Is this intentional - if so it probably needs to be documented in the commit
message. If not, the "err = -1" should be put at the start of the do { } while
loop for the GET_VF_RESOURCES command.
Perhaps to avoid future errors, each case in the switch should explicitly set
it's own default error value?
/Bruce
next prev parent reply other threads:[~2016-05-06 15:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-05 6:22 Jingjing Wu
2016-05-06 15:13 ` Bruce Richardson [this message]
2016-05-09 1:39 ` Wu, Jingjing
2016-05-10 2:51 ` [dpdk-dev] [PATCH v2] " Jingjing Wu
2016-05-30 16:31 ` Bruce Richardson
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