Mark Lord [mailto:mlord@pobox.com]

Sent: Wednesday, November 23, 2016 9:41 PM

[...] 

quoted

static void r8153_set_rx_early_size(struct r8152 *tp)
{
       u32 mtu = tp->netdev->mtu;
       u32 ocp_data = (agg_buf_sz - mtu - VLAN_ETH_HLEN - VLAN_HLEN) / 4;

       ocp_write_word(tp, MCU_TYPE_USB, USB_RX_EARLY_SIZE, ocp_data);
}

How is ocp_data used by the hardware?
Shouldn't the calculation also include sizeof(rx_desc) in there somewhere?

I check your question with our hw engineers, and you are right.
The size of rx descriptor should be calculated, too.

Best Regards,
Hayes