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Marc Haber reported we don't honor interface indexes when we receive link local router addresses in router advertisements. Luckily the non-strict version of ipv6_chk_addr already does the correct job here, so we can simply use it to lighten the checks and use those addresses by default without any configuration change. Link: <http://permalink.gmane.org/gmane.linux.network/391348> Reported-by: Marc Haber <mh+netdev@zugschlus.de> Cc: Marc Haber <mh+netdev@zugschlus.de> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>