Xin LI 5b8f1a8676 Fix a LOR acquiring the if_afdata lock while holding an rtentry lock.
Possibly do some entra work in case we would not get into the
ifa0 != NULL paths later as we already do for the mltaddr before.

XXX We should possibly error in case in6_setscope fails.

Reference: http://lists.freebsd.org/pipermail/freebsd-net/2011-September/029829.html

Submitted by:	bz
MFC after:	1 week
2012-06-25 20:56:32 +00:00
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