Re: [dpdk-stable] [PATCH] net/vhost: fix return value of vhost creates not checked

[Tiwei Bie <tiwei.bie@intel.com>]

On Mon, Dec 16, 2019 at 09:05:59AM +0800, Yunjian Wang wrote:
> The function eth_dev_vhost_create() could return errors,
> the return value need to be checked.
> 
> Fixes: ee584e9710b9 ("vhost: add driver on top of the library")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> ---
>  drivers/net/vhost/rte_eth_vhost.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
> index 46f01a7..7e4faf2 100644
> --- a/drivers/net/vhost/rte_eth_vhost.c
> +++ b/drivers/net/vhost/rte_eth_vhost.c
> @@ -1455,8 +1455,10 @@ struct vhost_xstats_name_off {
>  	if (dev->device.numa_node == SOCKET_ID_ANY)
>  		dev->device.numa_node = rte_socket_id();
>  
> -	eth_dev_vhost_create(dev, iface_name, queues, dev->device.numa_node,
> -		flags, disable_flags);
> +	ret = eth_dev_vhost_create(dev, iface_name, queues,
> +			dev->device.numa_node, flags, disable_flags);
> +	if (ret == -1)
> +		VHOST_LOG(ERR, "Failed to create %s", name);

This will set "ret" to port id on success,
but we shouldn't return port id in probe.

>  
>  out_free:
>  	rte_kvargs_free(kvlist);
> -- 
> 1.8.3.1
> 
>