ip6_gre: update version related info when changing link
[ Upstream commit 80b3671e9377916bf2b02e56113fa7377ce5705a ] We forgot to update ip6erspan version related info when changing link, which will cause setting new hwid failed. Reported-by: NJianlin Shi <jishi@redhat.com> Fixes: 94d7d8f2 ("ip6_gre: add erspan v2 support") Signed-off-by: NHangbin Liu <liuhangbin@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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