From: Ben Hutchings <[email protected]> Date: Tue, 14 Aug 2012 23:33:44 +0100
> I think we will also need to limit the depth of the device stack so we > don't run out of stack space here. __netif_receive() implements a kind > of tail recursion whenever a packet is passed up, but > __netdev_has_upper_dev() can't avoid doing real recursion (without the > addition of a flag to net_device so it can mark its progress). Agreed, we need some kind of limit here.
