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path: root/drivers/net/xen-netfront.c
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Diffstat (limited to 'drivers/net/xen-netfront.c')
-rw-r--r--drivers/net/xen-netfront.c25
1 files changed, 16 insertions, 9 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 922ce0abf5cf..9dd2ca62d84a 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -87,6 +87,7 @@ struct netfront_cb {
/* IRQ name is queue name with "-tx" or "-rx" appended */
#define IRQ_NAME_SIZE (QUEUE_NAME_SIZE + 3)
+static DECLARE_WAIT_QUEUE_HEAD(module_load_q);
static DECLARE_WAIT_QUEUE_HEAD(module_unload_q);
struct netfront_stats {
@@ -893,7 +894,6 @@ static RING_IDX xennet_fill_frags(struct netfront_queue *queue,
struct sk_buff *skb,
struct sk_buff_head *list)
{
- struct skb_shared_info *shinfo = skb_shinfo(skb);
RING_IDX cons = queue->rx.rsp_cons;
struct sk_buff *nskb;
@@ -902,15 +902,16 @@ static RING_IDX xennet_fill_frags(struct netfront_queue *queue,
RING_GET_RESPONSE(&queue->rx, ++cons);
skb_frag_t *nfrag = &skb_shinfo(nskb)->frags[0];
- if (shinfo->nr_frags == MAX_SKB_FRAGS) {
+ if (skb_shinfo(skb)->nr_frags == MAX_SKB_FRAGS) {
unsigned int pull_to = NETFRONT_SKB_CB(skb)->pull_to;
BUG_ON(pull_to <= skb_headlen(skb));
__pskb_pull_tail(skb, pull_to - skb_headlen(skb));
}
- BUG_ON(shinfo->nr_frags >= MAX_SKB_FRAGS);
+ BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
- skb_add_rx_frag(skb, shinfo->nr_frags, skb_frag_page(nfrag),
+ skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
+ skb_frag_page(nfrag),
rx->offset, rx->status, PAGE_SIZE);
skb_shinfo(nskb)->nr_frags = 0;
@@ -1330,6 +1331,11 @@ static struct net_device *xennet_create_dev(struct xenbus_device *dev)
netif_carrier_off(netdev);
xenbus_switch_state(dev, XenbusStateInitialising);
+ wait_event(module_load_q,
+ xenbus_read_driver_state(dev->otherend) !=
+ XenbusStateClosed &&
+ xenbus_read_driver_state(dev->otherend) !=
+ XenbusStateUnknown);
return netdev;
exit:
@@ -1810,7 +1816,7 @@ static int talk_to_netback(struct xenbus_device *dev,
err = xen_net_read_mac(dev, info->netdev->dev_addr);
if (err) {
xenbus_dev_fatal(dev, err, "parsing %s/mac", dev->nodename);
- goto out;
+ goto out_unlocked;
}
rtnl_lock();
@@ -1925,6 +1931,7 @@ abort_transaction_no_dev_fatal:
xennet_destroy_queues(info);
out:
rtnl_unlock();
+out_unlocked:
device_unregister(&dev->dev);
return err;
}
@@ -1950,10 +1957,6 @@ static int xennet_connect(struct net_device *dev)
/* talk_to_netback() sets the correct number of queues */
num_queues = dev->real_num_tx_queues;
- rtnl_lock();
- netdev_update_features(dev);
- rtnl_unlock();
-
if (dev->reg_state == NETREG_UNINITIALIZED) {
err = register_netdev(dev);
if (err) {
@@ -1963,6 +1966,10 @@ static int xennet_connect(struct net_device *dev)
}
}
+ rtnl_lock();
+ netdev_update_features(dev);
+ rtnl_unlock();
+
/*
* All public and private state should now be sane. Get
* ready to start sending and receiving packets and give the driver