accessing Link key within the Bluetooth module

Hi,

I am working on a Bluetooth AMP manager module (linked to l2cap module) 
that require access to the Link key of the connected(paired) device.

I am trying to use the hci_find_link_key() call with the BDADDR of the 
remote device as parameter without success. It looks like the list 
"hci_dev.link_keys" is not getting populated in the first place.

Note: The device is already paired with the local device, so the link 
key should be available( I do see the link_key_notify_evt getting called).

is there any way to access the link key of a paired device inside the 
Bluetooth module?

Regards
Suraj