Our portal may be destroyed while there are connections alive.
This means we are doing list_del() from list_head that no longer exists
Signed-off-by: Yan Burman <yanb@mellanox.com>
git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/iser@5866 d57e44dd-8a1f-0410-8b47-8ef2f437770f