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

[wangyunjian <wangyunjian@huawei.com>]

> -----Original Message-----
> From: Tiwei Bie [mailto:tiwei.bie@intel.com]
> Sent: Monday, December 16, 2019 1:33 PM
> To: wangyunjian <wangyunjian@huawei.com>
> Cc: dev@dpdk.org; maxime.coquelin@redhat.com; zhihong.wang@intel.com;
> xudingke <xudingke@huawei.com>; stable@dpdk.org
> Subject: Re: [PATCH] net/vhost: fix return value of vhost creates not checked
> 
> 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.

OK, I agree. How about function eth_dev_vhost_create can return 0 on success?

Thanks
Yunjian

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