net_sched: gred: eliminate redundant DP prio comparisons

Each pair of DPs only needs to be compared once when searching for
a non-unique prio value.

Signed-off-by: David Ward <david.ward@ll.mit.edu>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 3 deletions

diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c
index fca73cdf44d9..e19d4ebfea1c 100644
--- a/net/sched/sch_gred.c
+++ b/net/sched/sch_gred.c
@@ -102,9 +102,8 @@ static inline int gred_wred_mode_check(struct Qdisc *sch)
                 if (q == NULL)
                         continue;
 
-                for (n = 0; n < table->DPs; n++)
-                        if (table->tab[n] && table->tab[n] != q &&
-                            table->tab[n]->prio == q->prio)
+                for (n = i + 1; n < table->DPs; n++)
+                        if (table->tab[n] && table->tab[n]->prio == q->prio)
                                 return 1;
         }