I40E_RXBUFFER_1536
vsi->rx_buf_len = I40E_RXBUFFER_1536 - NET_IP_ALIGN;
((NET_SKB_PAD + I40E_RXBUFFER_1536) > SKB_WITH_OVERHEAD(I40E_RXBUFFER_2048))
rx_buf_len = I40E_RXBUFFER_1536;