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authorDavid S. Miller <davem@davemloft.net>2008-07-17 00:34:19 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-17 19:21:00 -0700
commite8a0464cc950972824e2e128028ae3db666ec1ed (patch)
tree5022b95396c0f3b313531bc39b19543c03551b9a /drivers/net/ifb.c
parent070825b3840a743e21ebcc44f8279708a4fed977 (diff)
downloadlinux-e8a0464cc950972824e2e128028ae3db666ec1ed.tar.bz2
netdev: Allocate multiple queues for TX.
alloc_netdev_mq() now allocates an array of netdev_queue structures for TX, based upon the queue_count argument. Furthermore, all accesses to the TX queues are now vectored through the netdev_get_tx_queue() and netdev_for_each_tx_queue() interfaces. This makes it easy to grep the tree for all things that want to get to a TX queue of a net device. Problem spots which are not really multiqueue aware yet, and only work with one queue, can easily be spotted by grepping for all netdev_get_tx_queue() calls that pass in a zero index. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ifb.c')
-rw-r--r--drivers/net/ifb.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index ccbd6554f6eb..897b05e79ed0 100644
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -229,14 +229,20 @@ module_param(numifbs, int, 0);
MODULE_PARM_DESC(numifbs, "Number of ifb devices");
/*
- * dev_ifb->tx_queue.lock is usually taken after dev->rx_queue.lock,
+ * dev_ifb's TX queue lock is usually taken after dev->rx_queue.lock,
* reversely to e.g. qdisc_lock_tree(). It should be safe until
- * ifb doesn't take dev->tx_queue.lock with dev_ifb->rx_queue.lock.
+ * ifb doesn't take dev's TX queue lock with dev_ifb->rx_queue.lock.
* But lockdep should know that ifb has different locks from dev.
*/
static struct lock_class_key ifb_tx_queue_lock_key;
static struct lock_class_key ifb_rx_queue_lock_key;
+static void set_tx_lockdep_key(struct net_device *dev,
+ struct netdev_queue *txq,
+ void *_unused)
+{
+ lockdep_set_class(&txq->lock, &ifb_tx_queue_lock_key);
+}
static int __init ifb_init_one(int index)
{
@@ -258,7 +264,7 @@ static int __init ifb_init_one(int index)
if (err < 0)
goto err;
- lockdep_set_class(&dev_ifb->tx_queue.lock, &ifb_tx_queue_lock_key);
+ netdev_for_each_tx_queue(dev_ifb, set_tx_lockdep_key, NULL);
lockdep_set_class(&dev_ifb->rx_queue.lock, &ifb_rx_queue_lock_key);
return 0;