Re: [dpdk-dev] [PATCH 2/2] net/vhost: prevent multiple setup on reconfig

[David Marchand <david.marchand@redhat.com>]

On Tue, Feb 18, 2020 at 3:35 PM Maxime Coquelin
<maxime.coquelin@redhat.com> wrote:
>
> Ethdev's .dev_configure callback can be called multiple
> time during a device life-time, but Vhost makes the
> wrong assumption that it is not the case and try to
> setup again the device on reconfiguration.
>
> This patch ensures the device hasn't been already setup
> before proceeding.
>
> Fixes: 3d01b759d267 ("net/vhost: delay driver setup")
>
> Reported-by: Yinan Wang <yinan.wang@intel.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>  drivers/net/vhost/rte_eth_vhost.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
> index c0056bc8bf..c4643da120 100644
> --- a/drivers/net/vhost/rte_eth_vhost.c
> +++ b/drivers/net/vhost/rte_eth_vhost.c
> @@ -876,6 +876,11 @@ vhost_driver_setup(struct rte_eth_dev *eth_dev)
>         unsigned int numa_node = eth_dev->device->numa_node;
>         const char *name = eth_dev->device->name;
>
> +       /* Don't try to setup again if it has already been done. */
> +       list = find_internal_resource(internal->iface_name);
> +       if (list)
> +               return 0;
> +
>         list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
>         if (list == NULL)
>                 return -1;
> --
> 2.24.1
>

Reviewed-by: David Marchand <david.marchand@redhat.com>


-- 
David Marchand