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Commit a523310d authored by Sabrina Dubroca's avatar Sabrina Dubroca Committed by Kevin Ma
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ipv6: clean up anycast when an interface is destroyed


If we try to rmmod the driver for an interface while sockets with
setsockopt(JOIN_ANYCAST) are alive, some refcounts aren't cleaned up
and we get stuck on:

  unregister_netdevice: waiting for ens3 to become free. Usage count = 1

If we LEAVE_ANYCAST/close everything before rmmod'ing, there is no
problem.

We need to perform a cleanup similar to the one for multicast in
addrconf_ifdown(how == 1).

BUG: 18902601
Change-Id: I6d51aed5755eb5738fcba91950e7773a1c985d2e
Signed-off-by: default avatarSabrina Dubroca <sd@queasysnail.net>
Acked-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a938169a
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