tree 50b4bbbd0e4e0c6fc9a5daeb8d51a55e0eaab12c
parent 758c57d16adcbec3c03e85f0c9a5b4ca31f6c507
author Stephen Hemminger <stephen@networkplumber.org> 1371503770 -0700
committer Stephen Hemminger <stephen@networkplumber.org> 1372088432 -0700

vxlan: move IGMP join/leave to work queue

Do join/leave from work queue to avoid lock inversion problems
between normal socket and RTNL. The code comes out cleaner
as well.

Uses Cong Wang's suggestion to turn refcnt into a real atomic
since now need to handle case where last use of socket is IGMP
worker.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>