--- zzzz-none-000/linux-2.6.28.10/net/sched/sch_sfq.c	2009-05-02 18:54:43.000000000 +0000
+++ fusiv-7390-686/linux-2.6.28.10/net/sched/sch_sfq.c	2016-11-08 13:42:37.000000000 +0000
@@ -402,8 +402,9 @@
 	sfq_index a, old_a;
 
 	/* No active slots */
-	if (q->tail == SFQ_DEPTH)
+	if (q->max_depth == 0) {
 		return NULL;
+	}
 
 	a = old_a = q->next[q->tail];