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Diffstat (limited to 'net/6lowpan/core.c')
-rw-r--r--net/6lowpan/core.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/net/6lowpan/core.c b/net/6lowpan/core.c
index faf65baed617..34e44c0c0836 100644
--- a/net/6lowpan/core.c
+++ b/net/6lowpan/core.c
@@ -20,7 +20,7 @@
int lowpan_register_netdevice(struct net_device *dev,
enum lowpan_lltypes lltype)
{
- int ret;
+ int i, ret;
dev->addr_len = EUI64_ADDR_LEN;
dev->type = ARPHRD_6LOWPAN;
@@ -29,6 +29,10 @@ int lowpan_register_netdevice(struct net_device *dev,
lowpan_priv(dev)->lltype = lltype;
+ spin_lock_init(&lowpan_priv(dev)->ctx.lock);
+ for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
+ lowpan_priv(dev)->ctx.table[i].id = i;
+
ret = register_netdevice(dev);
if (ret < 0)
return ret;
@@ -68,6 +72,32 @@ void lowpan_unregister_netdev(struct net_device *dev)
}
EXPORT_SYMBOL(lowpan_unregister_netdev);
+static int lowpan_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ int i;
+
+ if (dev->type != ARPHRD_6LOWPAN)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_DOWN:
+ for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
+ clear_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE,
+ &lowpan_priv(dev)->ctx.table[i].flags);
+ break;
+ default:
+ return NOTIFY_DONE;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block lowpan_notifier = {
+ .notifier_call = lowpan_event,
+};
+
static int __init lowpan_module_init(void)
{
int ret;
@@ -76,6 +106,12 @@ static int __init lowpan_module_init(void)
if (ret < 0)
return ret;
+ ret = register_netdevice_notifier(&lowpan_notifier);
+ if (ret < 0) {
+ lowpan_debugfs_exit();
+ return ret;
+ }
+
request_module_nowait("ipv6");
request_module_nowait("nhc_dest");
@@ -92,6 +128,7 @@ static int __init lowpan_module_init(void)
static void __exit lowpan_module_exit(void)
{
lowpan_debugfs_exit();
+ unregister_netdevice_notifier(&lowpan_notifier);
}
module_init(lowpan_module_init);