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[IPV6] NDISC: Fix thinko to control Router Preference support.
Bug reported by Haruhito Watanabe <haruhito@sfc.keio.ac.jp>. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1062,7 +1062,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
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pref = ra_msg->icmph.icmp6_router_pref;
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/* 10b is handled as if it were 00b (medium) */
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if (pref == ICMPV6_ROUTER_PREF_INVALID ||
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in6_dev->cnf.accept_ra_rtr_pref)
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!in6_dev->cnf.accept_ra_rtr_pref)
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pref = ICMPV6_ROUTER_PREF_MEDIUM;
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#endif
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