netdev - [PATCH 5/5] net: sched: taprio: Fix taprio

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Date:   Fri, 19 Apr 2019 17:00:52 -0700
From:   Andre Guedes <andre.guedes@...el.com>
To:     netdev@...r.kernel.org
Cc:     vinicius.gomes@...el.com
Subject: [PATCH 5/5] net: sched: taprio: Fix taprio_dequeue()

In case we don't have 'guard' or 'budget' to transmit the skb, we should
continue traversing the qdisc list since the remaining guard/budget
might be enough to transmit a skb from other children qdiscs.

Fixes: 5a781ccbd19e (“tc: Add support for configuring the taprio scheduler”)
Signed-off-by: Andre Guedes <andre.guedes@...el.com>
---
 net/sched/sch_taprio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c
index 110436d11f86..9f361f2b7510 100644
--- a/net/sched/sch_taprio.c
+++ b/net/sched/sch_taprio.c
@@ -180,12 +180,12 @@ static struct sk_buff *taprio_dequeue(struct Qdisc *sch)
 		 */
 		if (gate_mask != TAPRIO_ALL_GATES_OPEN &&
 		    ktime_after(guard, entry->close_time))
-			return NULL;
+			continue;
 
 		/* ... and no budget. */
 		if (gate_mask != TAPRIO_ALL_GATES_OPEN &&
 		    atomic_sub_return(len, &entry->budget) < 0)
-			return NULL;
+			continue;
 
 		skb = child->ops->dequeue(child);
 		if (unlikely(!skb))
-- 
2.21.0