应用场景:

    有些公司想将模块换成合宙的模块，但是之前的模块出现的是USBxx 网卡，合宙的是ethxx ,这让就让应用程序改动应用程序，很是麻烦！

修改方法：

方法一  修改脚本 

       1.找到文件  /etc/udev/rules.d/70-persistent-net.rules    将SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="ac:00:00:c9:1e:c5", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*"  改成  SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="ac:00:00:c9:1e:c5", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="usb*",

方法二  修改内核   

step 1：

For Linux Kernel Version newer than 2.6.30
File: [KERNEL]/drivers/net/usb/usbnet.c

usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
{
        net->netdev_ops = &usbnet_netdev_ops;
        net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
        net->ethtool_ops = &usbnet_ethtool_ops;
        / allow device-specific bind/init procedures
        // NOTE net->name still not usable ...
        if (info->bind) {
        status = info->bind (dev, udev);
        if (status < 0)
           goto out1;
        // heuristic:  "usb%d" for links we know are two-host,
        // else "eth%d" when there's reasonable doubt.  userspace
        // can rename the link if it knows better.
        if ((dev->driver_info->flags & FLAG_ETHER) != 0 &&
         ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 ||
         (net->dev_addr [0] & 0x02) == 0))
         strcpy (net->name, "eth%d");       /**** 请将此处修改为 strcpy (net->name, "usb%d");   */
         /* WLAN devices should always be named "wlan%d" */
        if ((dev->driver_info->flags & FLAG_WLAN) != 0)
            strcpy(net->name, "wlan%d");
          /* WWAN devices should always be named "wwan%d" */
                if ((dev->driver_info->flags & FLAG_WWAN) != 0)
                strcpy(net->name, "wwan%d");

    

• step 2：
  为了禁止驱动将usb M0，M1加载为ttyUSB设备，需要将usb serial 驱动部分做如下修改：

For Linux Kernel Version newer than 2.6.30
File: [KERNEL]/drivers/usb/serial/option.c

static int option_probe(struct usb_serial *serial,
                        const struct usb_device_id *id)
{
        struct usb_interface_descriptor *iface_desc =
                                &serial->interface->cur_altsetting->desc;
        struct usb_device_descriptor *dev_desc = &serial->dev->descriptor;
        /* Never bind to the CD-Rom emulation interface */
        if (iface_desc->bInterfaceClass == 0x08)
        i       return -ENODEV;
        //+add by airm2m for Air72x
        if(dev_desc->idVendor == cpu_to_le16(0x1286) &&
           dev_desc->idProduct == cpu_to_le16(0x4e3d) &&
           iface_desc->bInterfaceNumber <= 1)
                return -ENODEV;
        //-add by airm2m for Air72x
        /*
         * Don't bind reserved interfaces (like network ones) which often have
         * the same class/subclass/protocol as the serial interfaces.  Look at
         * the Windows driver .INF files for reserved interface numbers.
         */
        if (is_blacklisted(
                iface_desc->bInterfaceNumber,
                OPTION_BLACKLIST_RESERVED_IF,
                (const struct option_blacklist_info *) id->driver_info))
                return -ENODEV;

优先推荐使用方法2