netdev - RE: [PATCH net 1/2] r8152: fix the sw rx checksum is unavailable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <0835B3720019904CB8F7AA43166CEEB201055E28@RTITMBSV03.realtek.com.tw>
Date:   Thu, 24 Nov 2016 12:37:23 +0000
From:   Hayes Wang <hayeswang@...ltek.com>
To:     Mark Lord <mlord@...ox.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

Mark Lord [mailto:mlord@...ox.com]
> Sent: Wednesday, November 23, 2016 9:41 PM
[...] 
> >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