diff options
Diffstat (limited to 'net/ieee802154/6lowpan/core.c')
| -rw-r--r-- | net/ieee802154/6lowpan/core.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c index 180e9f5..27c25ad 100644 --- a/net/ieee802154/6lowpan/core.c +++ b/net/ieee802154/6lowpan/core.c @@ -52,6 +52,8 @@ #include "6lowpan_i.h" +static int open_count; + static struct header_ops lowpan_header_ops = { .create = lowpan_header_create, }; @@ -141,12 +143,18 @@ static int lowpan_newlink(struct net *src_net, struct net_device *dev, lowpan_netdev_setup(dev, LOWPAN_LLTYPE_IEEE802154); ret = register_netdevice(dev); - if (ret >= 0) { - real_dev->ieee802154_ptr->lowpan_dev = dev; - lowpan_rx_init(); + if (ret < 0) { + dev_put(real_dev); + return ret; } - return ret; + real_dev->ieee802154_ptr->lowpan_dev = dev; + if (!open_count) + lowpan_rx_init(); + + open_count++; + + return 0; } static void lowpan_dellink(struct net_device *dev, struct list_head *head) @@ -156,7 +164,11 @@ static void lowpan_dellink(struct net_device *dev, struct list_head *head) ASSERT_RTNL(); - lowpan_rx_exit(); + open_count--; + + if (!open_count) + lowpan_rx_exit(); + real_dev->ieee802154_ptr->lowpan_dev = NULL; unregister_netdevice(dev); dev_put(real_dev); |
