Allow setting a tunnel without a tunnel key. This is required for
tunneling protocols, such as GRE, that define the key as an optional
field.
Signed-off-by: NAdi Nissim <adin@mellanox.com>
Acked-by: NOr Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: NOz Shlomo <ozsh@mellanox.com>
Acked-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>