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ifb: goto resched directly if error happens and dp->tq isn't empty

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If we break the loop when there are still skbs in tq and no skb in
rq, the skbs will be left in txq until new skbs are enqueued into rq.
In rare cases, no new skb is queued, then these skbs will stay in rq
forever.

After this patch, if tq isn't empty when we break the loop, we goto
resched directly.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Changli Gao 2010-12-04 14:09:08 +00:00 committed by David S. Miller
parent b1afde60f2
commit 75c1c82566
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ifb.c
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@ -104,6 +104,8 @@ static void ri_tasklet(unsigned long dev)
rcu_read_unlock();
dev_kfree_skb(skb);
stats->tx_dropped++;
if (skb_queue_len(&dp->tq) != 0)
goto resched;
break;
}
rcu_read_unlock();