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From: "Iremonger, Bernard" <bernard.iremonger@intel.com>
To: "Wu, Jingjing" <jingjing.wu@intel.com>, "dev@dpdk.org" <dev@dpdk.org>,
 "Lu, Wenzhuo" <wenzhuo.lu@intel.com>, "Zhang, Helin" <helin.zhang@intel.com>
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Thread-Topic: [PATCH v3 1/2] net/i40e: fix segmentation fault in close
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Date: Tue, 17 Jan 2017 16:30:23 +0000
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Subject: Re: [dpdk-stable] [PATCH v3 1/2] net/i40e: fix segmentation fault
	in close
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Hi Jingjing,

<snip>

> > Subject: [PATCH v3 1/2] net/i40e: fix segmentation fault in close
> >
> > Change the order of releasing the vsi's.
> > Release the vmdq vsi's first, then release the main vsi.
> >
> > Fixes: 4861cde46116 ("i40e: new poll mode driver")
> >
> > CC: stable@dpdk.org
> >
> > Signed-off-by: Bernard Iremonger <bernard.iremonger@intel.com>
> > ---
> >  drivers/net/i40e/i40e_ethdev.c | 12 +++++++-----
> >  1 file changed, 7 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/net/i40e/i40e_ethdev.c
> > b/drivers/net/i40e/i40e_ethdev.c index f13e61b..e8cfec8 100644
> > --- a/drivers/net/i40e/i40e_ethdev.c
> > +++ b/drivers/net/i40e/i40e_ethdev.c
> > @@ -2068,18 +2068,17 @@ i40e_dev_close(struct rte_eth_dev *dev)
> >  	/* shutdown and destroy the HMC */
> >  	i40e_shutdown_lan_hmc(hw);
> >
> > -	/* release all the existing VSIs and VEBs */
> > -	i40e_fdir_teardown(pf);
> > -	i40e_vsi_release(pf->main_vsi);
> > -
> >  	for (i =3D 0; i < pf->nb_cfg_vmdq_vsi; i++) {
> >  		i40e_vsi_release(pf->vmdq[i].vsi);
> >  		pf->vmdq[i].vsi =3D NULL;
> >  	}
> > -
> >  	rte_free(pf->vmdq);
> >  	pf->vmdq =3D NULL;
> >
> > +	/* release all the existing VSIs and VEBs */
> > +	i40e_fdir_teardown(pf);
> > +	i40e_vsi_release(pf->main_vsi);
> > +
> >  	/* shutdown the adminq */
> >  	i40e_aq_queue_shutdown(hw, true);
> >  	i40e_shutdown_adminq(hw);
> > @@ -4342,6 +4341,9 @@ i40e_vsi_release(struct i40e_vsi *vsi)
> >  	if (!vsi)
> >  		return I40E_SUCCESS;
> >
> > +	if (!vsi->adapter)
> > +		return I40E_ERR_BAD_PTR;
> > +
>=20
> The change looks fine to me.
> Only minor comments like:
> The dev_close is ethdev level ops, I40E_XX error code need to be replaced
> by The error code defined in ethedev level.

I will replace I40E_ERR_BAD_PTR with -EFAULT in v4.

Regards,

Bernard.