syncppp: Fix crashes.

The syncppp layer wants a mid-level netdev private pointer.

It was using netdev->priv but that only worked by accident,
and thus this scheme was broken when the device private
allocation strategy changed.

Add a proper mid-layer private pointer for uses like this,
update syncppp and all users, and remove the HDLC_PPP broken
tag from drivers/net/wan/Kconfig

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 7c1d4466583b..746901774d49 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -715,6 +715,9 @@ struct net_device
         struct net              *nd_net;
 #endif
 
+        /* mid-layer private */
+        void                    *ml_priv;
+
         /* bridge stuff */
         struct net_bridge_port  *br_port;
         /* macvlan */