I40E_BW_CREDIT_DIVISOR
do_div(credits, I40E_BW_CREDIT_DIVISOR);
do_div(credits, I40E_BW_CREDIT_DIVISOR);
max_tx_rate = I40E_BW_CREDIT_DIVISOR;
if (max_tx_rate && max_tx_rate < I40E_BW_CREDIT_DIVISOR) {
max_tx_rate = I40E_BW_CREDIT_DIVISOR;
do_div(credits, I40E_BW_CREDIT_DIVISOR);
do_div(credits, I40E_BW_CREDIT_DIVISOR);
do_div(credits, I40E_BW_CREDIT_DIVISOR);
max_tx_rate = div_u64(max_tx_rate, I40E_BW_CREDIT_DIVISOR);