Provided by: linux-doc-2.6.15_2.6.15-23.39_all
sppp_reopen - notify of physical link loss
int sppp_reopen (struct net_device * dev);
dev Device that lost the link
This function informs the synchronous protocol code that the underlying
link died (for example a carrier drop on X.21)
We increment the magic numbers to ensure that if the other end failed
to notice we will correctly start a new session. It happens do to the
nature of telco circuits is that you can lose carrier on one endonly.
Having done this we go back to negotiating. This function may be called
from an interrupt context.