geneve: only configure or fill UDP_ZERO_CSUM6_RX/TX info when CONFIG_IPV6
commit f9094b76 upstream. Stefano pointed that configure or show UDP_ZERO_CSUM6_RX/TX info doesn't make sense if we haven't enabled CONFIG_IPV6. Fix it by adding if IS_ENABLED(CONFIG_IPV6) check. Fixes: abe492b4 ("geneve: UDP checksum configuration via netlink") Fixes: fd7eafd0 ("geneve: fix fill_info when link down") Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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