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path: root/drivers/net/ppp/ppp_generic.c
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Diffstat (limited to 'drivers/net/ppp/ppp_generic.c')
-rw-r--r--drivers/net/ppp/ppp_generic.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index 96fa0e61d3af..440d5f42810f 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -1338,7 +1338,17 @@ ppp_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats64)
static int ppp_dev_init(struct net_device *dev)
{
+ struct ppp *ppp;
+
netdev_lockdep_set_classes(dev);
+
+ ppp = netdev_priv(dev);
+ /* Let the netdevice take a reference on the ppp file. This ensures
+ * that ppp_destroy_interface() won't run before the device gets
+ * unregistered.
+ */
+ atomic_inc(&ppp->file.refcnt);
+
return 0;
}
@@ -1361,6 +1371,15 @@ static void ppp_dev_uninit(struct net_device *dev)
wake_up_interruptible(&ppp->file.rwait);
}
+static void ppp_dev_priv_destructor(struct net_device *dev)
+{
+ struct ppp *ppp;
+
+ ppp = netdev_priv(dev);
+ if (atomic_dec_and_test(&ppp->file.refcnt))
+ ppp_destroy_interface(ppp);
+}
+
static const struct net_device_ops ppp_netdev_ops = {
.ndo_init = ppp_dev_init,
.ndo_uninit = ppp_dev_uninit,
@@ -1386,6 +1405,7 @@ static void ppp_setup(struct net_device *dev)
dev->tx_queue_len = 3;
dev->type = ARPHRD_PPP;
dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
+ dev->destructor = ppp_dev_priv_destructor;
netif_keep_dst(dev);
}