IGB driver not getting Rx interrupt

Hi, I ported igb-1.2.45-k2 driver to ankh. Ankh is able to initialize the Ethernet device using this driver. I am testing this with lwip_test example. Using this driver Ankh is able to send out "DHCP Discover" packet and the Gateway/Router sends back an "DHCP Offer" packet. But the hardware never generates an Rx interrupt in the driver. How can I debug/solve this problem? Attached is the log with a lot of debugging turned on, and also debug messages added in the driver itself.