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net: Simplify RX queue allocation

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This patch move RX queue allocation to alloc_netdev_mq and freeing of
the queues to free_netdev (symmetric to TX queue allocation).  Each
kobject RX queue takes a reference to the queue's device so that the
device can't be freed before all the kobjects have been released-- this
obviates the need for reference counts specific to RX queues.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert
2010-11-09 10:47:38 +00:00
committed by David S. Miller
parent ed9af2e839
commit fe8222406c
3 changed files with 13 additions and 16 deletions
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7
net/core/net-sysfs.c
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@@ -706,7 +706,6 @@ static struct attribute *rx_queue_default_attrs[] = {
static void rx_queue_release(struct kobject *kobj)
{
struct netdev_rx_queue *queue = to_rx_queue(kobj);
struct netdev_rx_queue *first = queue->first;
struct rps_map *map;
struct rps_dev_flow_table *flow_table;
@@ -719,8 +718,7 @@ static void rx_queue_release(struct kobject *kobj)
if (flow_table)
call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
if (atomic_dec_and_test(&first->count))
kfree(first);
dev_put(queue->dev);
}
static struct kobj_type rx_queue_ktype = {
@@ -732,7 +730,6 @@ static struct kobj_type rx_queue_ktype = {
static int rx_queue_add_kobject(struct net_device *net, int index)
{
struct netdev_rx_queue *queue = net->_rx + index;
struct netdev_rx_queue *first = queue->first;
struct kobject *kobj = &queue->kobj;
int error = 0;
@@ -745,7 +742,7 @@ static int rx_queue_add_kobject(struct net_device *net, int index)
}
kobject_uevent(kobj, KOBJ_ADD);
atomic_inc(&first->count);
dev_hold(queue->dev);
return error;
}