The send_buf is always used throughout the life-span of the CvP driver. Hence, we thought it would be wise to just pre-allocate it one time at the start of the probe/init. It is also fine if we do it in the altera_cvp_write. The only issue we see in this is that, a minor hit on the performance as you need to then, allocate the buffer on every new CvP FPGA configuration write. As for STEP 16, the previous implementation checks the Error latch bit which stores the previous transaction's result. If an error occurs prior to this, the driver would throw an error which is not right. The correct step is to just check for the current CvP error status from the register. Hope that is fine with you. Thanks