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| author | David S. Miller <davem@davemloft.net> | 2008-07-31 16:58:50 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-07-31 16:58:50 -0700 |
| commit | c3f26a269c2421f97f10cf8ed05d5099b573af4d (patch) | |
| tree | d0602cbb48742b3e39ab6bdcaa08c342d4cd2cae /drivers/net/ifb.c | |
| parent | 967ab999a090b1a4e7d3c7febfd6d89b42fb4cf4 (diff) | |
| download | linux-c3f26a269c2421f97f10cf8ed05d5099b573af4d.tar.gz linux-c3f26a269c2421f97f10cf8ed05d5099b573af4d.tar.bz2 linux-c3f26a269c2421f97f10cf8ed05d5099b573af4d.zip | |
netdev: Fix lockdep warnings in multiqueue configurations.
When support for multiple TX queues were added, the
netif_tx_lock() routines we converted to iterate over
all TX queues and grab each queue's spinlock.
This causes heartburn for lockdep and it's not a healthy
thing to do with lots of TX queues anyways.
So modify this to use a top-level lock and a "frozen"
state for the individual TX queues.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ifb.c')
| -rw-r--r-- | drivers/net/ifb.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c index 0960e69b2da4..e4fbefc8c82f 100644 --- a/drivers/net/ifb.c +++ b/drivers/net/ifb.c @@ -69,18 +69,20 @@ static void ri_tasklet(unsigned long dev) struct net_device *_dev = (struct net_device *)dev; struct ifb_private *dp = netdev_priv(_dev); struct net_device_stats *stats = &_dev->stats; + struct netdev_queue *txq; struct sk_buff *skb; + txq = netdev_get_tx_queue(_dev, 0); dp->st_task_enter++; if ((skb = skb_peek(&dp->tq)) == NULL) { dp->st_txq_refl_try++; - if (netif_tx_trylock(_dev)) { + if (__netif_tx_trylock(txq)) { dp->st_rxq_enter++; while ((skb = skb_dequeue(&dp->rq)) != NULL) { skb_queue_tail(&dp->tq, skb); dp->st_rx2tx_tran++; } - netif_tx_unlock(_dev); + __netif_tx_unlock(txq); } else { /* reschedule */ dp->st_rxq_notenter++; @@ -115,7 +117,7 @@ static void ri_tasklet(unsigned long dev) BUG(); } - if (netif_tx_trylock(_dev)) { + if (__netif_tx_trylock(txq)) { dp->st_rxq_check++; if ((skb = skb_peek(&dp->rq)) == NULL) { dp->tasklet_pending = 0; @@ -123,10 +125,10 @@ static void ri_tasklet(unsigned long dev) netif_wake_queue(_dev); } else { dp->st_rxq_rsch++; - netif_tx_unlock(_dev); + __netif_tx_unlock(txq); goto resched; } - netif_tx_unlock(_dev); + __netif_tx_unlock(txq); } else { resched: dp->tasklet_pending = 1; |