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-rw-r--r--net/sched/sch_sfq.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index 58b42dcf8f20..a903b3c46805 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -310,7 +310,10 @@ drop:
/* It is difficult to believe, but ALL THE SLOTS HAVE LENGTH 1. */
x = q->tail->next;
slot = &q->slots[x];
- q->tail->next = slot->next;
+ if (slot->next == x)
+ q->tail = NULL; /* no more active slots */
+ else
+ q->tail->next = slot->next;
q->ht[slot->hash] = SFQ_EMPTY_SLOT;
goto drop;
}