ceph: print debug message before put mds session

The mds session, s, could be freed during ceph_put_mds_session.
Move dout before ceph_put_mds_session.
Signed-off-by: Henry C Chang <henry.cy.chang@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/mds_client.c

@@ -3304,8 +3304,8 @@ static void con_put(struct ceph_connection *con)
 {
 	struct ceph_mds_session *s = con->private;
 
+	dout("mdsc con_put %p (%d)\n", s, atomic_read(&s->s_ref) - 1);
 	ceph_put_mds_session(s);
-	dout("mdsc con_put %p (%d)\n", s, atomic_read(&s->s_ref));
 }
 
 /*