CHUNK_DATA
temp = (remaining > CHUNK_DATA ? CHUNK_DATA : remaining) - 1;
temp = msgs->len > CHUNK_DATA ? CHUNK_DATA - 1 : msgs->len - 1;
cmd_num = DIV_ROUND_UP(rx_remain, CHUNK_DATA);
temp = rx_remain > CHUNK_DATA ? CHUNK_DATA - 1 : rx_remain - 1;
rx_remain -= CHUNK_DATA;
cmd_num = DIV_ROUND_UP(dma->dma_len, CHUNK_DATA);