device_add — add device to device hierarchy.
int device_add ( | struct device * dev); |
This is part 2 of device_register, though may be called
separately _iff_ device_initialize has been called separately.
This adds dev to the kobject hierarchy via kobject_add, adds it
to the global and sibling lists for the device, then
adds it to the other relevant subsystems of the driver model.
Do not call this routine or device_register more than once for
any device structure. The driver model core is not designed to work
with devices that get unregistered and then spring back to life.
(Among other things, it's very hard to guarantee that all references
to the previous incarnation of dev have been dropped.) Allocate
and register a fresh new struct device instead.
_Never_ directly free dev after calling this function, even
if it returned an error! Always use put_device to give up your
reference instead.