fq_codel: fix TCA_FQ_CODEL_DROP_BATCH_SIZE sanity checks

My intent was to not let users set a zero drop_batch_size,
it seems I once again messed with min()/max().

Fixes: 9d18562 ("fq_codel: add batch ability to fq_codel_drop()")
Signed-off-by: Eric Dumazet <[email protected]>
Acked-by: Toke Høiland-Jørgensen <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: edumazet

net/sched/sch_fq_codel.c

@@ -416,7 +416,7 @@ static int fq_codel_change(struct Qdisc *sch, struct nlattr *opt,
 		q->quantum = max(256U, nla_get_u32(tb[TCA_FQ_CODEL_QUANTUM]));
 
 	if (tb[TCA_FQ_CODEL_DROP_BATCH_SIZE])
-		q->drop_batch_size = min(1U, nla_get_u32(tb[TCA_FQ_CODEL_DROP_BATCH_SIZE]));
+		q->drop_batch_size = max(1U, nla_get_u32(tb[TCA_FQ_CODEL_DROP_BATCH_SIZE]));
 
 	if (tb[TCA_FQ_CODEL_MEMORY_LIMIT])
 		q->memory_limit = min(1U << 31, nla_get_u32(tb[TCA_FQ_CODEL_MEMORY_LIMIT]));