We were trying to use the LS1021A-IOT gateway(rev 1) reference board ethernet ports(SGMII). It works properly in uboot. But in linux it comes up but after a few ping it fails. On debugging we could observe that we are getting an error interrupt, IEVENT_BSY and then the board only receives packets and not processing or transmitting the reply. As per reference manual, "Busy condition interrupt - Indicates that a frame was received and discarded due to a lack of buffers.". Can anyone guide us on why this could be happening and how to fix it.