Thanks, applied to master and branch-2.11.

On Wed, Jan 23, 2019 at 11:28:25AM -0800, Yifeng Sun wrote:
> Thanks, looks good to me.
> 
> Reviewed-by: Yifeng Sun <[email protected]>
> 
> On Tue, Jan 22, 2019 at 3:45 PM Greg Rose <[email protected]> wrote:
> 
> > Our code to determine whether receive functionality will work with
> > ip6 gre depends on the return of -EEXIST but inet6_add_protocol()
> > returns a -1 on failure to grab the pointer via a cmpxchg op.  Just
> > set the error return to -EEXIST to help out the vport init function.
> >
> > Reported-at:
> > https://mail.openvswitch.org/pipermail/ovs-discuss/2019-January/048090.html
> > Reported-by: Ken Ajiro <[email protected]>
> > Signed-off-by: Greg Rose <[email protected]>
> > ---
> >  datapath/linux/compat/ip6_gre.c | 7 +++++++
> >  1 file changed, 7 insertions(+)
> >
> > diff --git a/datapath/linux/compat/ip6_gre.c
> > b/datapath/linux/compat/ip6_gre.c
> > index 1827852..2ffdda5 100644
> > --- a/datapath/linux/compat/ip6_gre.c
> > +++ b/datapath/linux/compat/ip6_gre.c
> > @@ -2802,6 +2802,13 @@ int rpl_ip6gre_init(void)
> >         if (err < 0) {
> >                 pr_info("%s: can't add protocol\n", __func__);
> >                 unregister_pernet_device(&ip6gre_net_ops);
> > +               /*
> > +                * inet6_add_protocol will return a -1 if it fails
> > +                * to grab the pointer but the vport initialization
> > +                * expects a return value of -EEXIST.  Set err to
> > +                * -EEXIST here to ensure proper handling.
> > +                */
> > +               err = -EEXIST;
> >                 goto ip6_gre_loaded;
> >         }
> >
> > --
> > 1.8.3.1
> >
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> >
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