igmp: do not remove igmp souce list info when set link down
In commit 24cf3af3 ("igmp: call ip_mc_clear_src..."), we forgot to remove igmpv3_clear_delrec() in ip_mc_down(), which also called ip_mc_clear_src(). This make us clear all IGMPv3 source filter info after NETDEV_DOWN. Move igmpv3_clear_delrec() to ip_mc_destroy_dev() and then no need ip_mc_clear_src() in ip_mc_destroy_dev(). On the other hand, we should restore back instead of free all source filter info in igmpv3_del_delrec(). Or we will not able to restore IGMPv3 source filter info after NETDEV_UP and NETDEV_POST_TYPE_CHANGE. Fixes: 24cf3af3 ("igmp: call ip_mc_clear_src() only when ...") Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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