linux-kernel - Re: [PATCH net 1/2] r8152: fix the sw rx checksum is unavailable

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Message-ID: <b61a0e10-c737-8912-3e4e-393f4eb32077@pobox.com>
Date:   Wed, 23 Nov 2016 08:41:29 -0500
From:   Mark Lord <mlord@...ox.com>
To:     Hayes Wang <hayeswang@...ltek.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Cc:     nic_swsd <nic_swsd@...ltek.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [PATCH net 1/2] r8152: fix the sw rx checksum is unavailable

What does this code do:

>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?

Thanks
-- 
Mark Lord
Real-Time Remedies Inc.
mlord@...ox.com