NAME
     DEVICE_SHUTDOWN - called during system shutdown
SYNOPSIS
     #include <sys/param.h>
     #include <sys/bus.h>
     int
     DEVICE_SHUTDOWN(device_t dev);
DESCRIPTION
     The DEVICE_SHUTDOWN() method is called during system shutdown to allow
     the driver to put the hardware into a consistent state for rebooting the
     computer.
RETURN VALUES
     Zero is returned on success, otherwise an error is returned.
SEE ALSO
     device(9), DEVICE_ATTACH(9), DEVICE_DETACH(9), DEVICE_IDENTIFY(9),
     DEVICE_PROBE(9)
AUTHORS
     This manual page was written by Doug Rabson.