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net: sched: taprio: Fix taprio_peek() 

While traversing taprio's children qdisc list, if the gate is closed for
a given traffic class, we should continue traversing the list since the
remaining qdiscs may have skb ready for transmission.

This patch also takes this opportunity and changes the function to use
the TAPRIO_ALL_GATES_OPEN macro instead of the magic number '-1'.

Fixes: 5a781ccbd1 (“tc: Add support for configuring the taprio scheduler”)
Signed-off-by: Andre Guedes <andre.guedes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andre Guedes 2019-04-23 12:44:23 -07:00 committed by David S. Miller
parent 5175aafe71
commit 2684d1b75f
1 changed files with 2 additions and 2 deletions
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4
net/sched/sch_taprio.c
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@ -90,7 +90,7 @@ static struct sk_buff *taprio_peek(struct Qdisc *sch)
rcu_read_lock();
entry = rcu_dereference(q->current_entry);
gate_mask = entry ? entry->gate_mask : -1;
gate_mask = entry ? entry->gate_mask : TAPRIO_ALL_GATES_OPEN;
rcu_read_unlock();
if (!gate_mask)
@ -112,7 +112,7 @@ static struct sk_buff *taprio_peek(struct Qdisc *sch)
tc = netdev_get_prio_tc_map(dev, prio);
if (!(gate_mask & BIT(tc)))
return NULL;
continue;
return skb;
}