New: tun device's speed is set to ony 10mbps

http://bugzilla.kernel.org/show_bug.cgi?id=11620

           Summary: tun device's speed is set to ony 10mbps
           Product: Drivers
           Version: 2.5
     KernelVersion: 2.6.24-19-generic

Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Network
AssignedTo: [email protected]
ReportedBy: [email protected]

Latest working kernel version:2.6.24-19-generic

Earliest failing kernel version:
Distribution:
Hardware Environment:
Software Environment:linux- ubuntu
Problem Description: When I open tun device, speed is set to 10mbps and I am not able to change it to 100 Mbps

Steps to reproduce:

1) here is ioctl stuff my tun device

        if (device) strncpy(tun->ifr.ifr_name, device, IFNAMSIZ);
        tun->ifr.ifr_flags=(flags)?flags:IFF_TUN|IFF_NO_PI;
        tun->fd=open("/dev/net/tun", O_RDWR);
        //#ioctl(tun->fd, TUNSETIFF, (void *) &(tun->ifr));
        ioctl(tun->fd, TUNSETIFF, (void *) &(tun->ifr));
        ioctl(tun->fd,TUNSETPERSIST,1);
        ioctl(tun->fd,TUNSETOWNER,500);
        return (PyObject *)tun;

2) Once I create tun device, here are properties of my tun device

root@daya-desktop:/home/daya/tuntap-0.1# ethtool tun0
Settings for tun0:
        Supported ports: [ ]
        Supported link modes:   
        Supports auto-negotiation: No
        Advertised link modes:  Not reported
        Advertised auto-negotiation: No
        Speed: 10Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        Current message level: 0xffffffa1 (-95)
        Link detected: no

3) When I tried to change the speed, it is throwing the following error

root@daya-desktop:/home/daya/tuntap-0.1# ethtool -s tun0 speed 100
Cannot set new settings: Operation not supported
  not setting speed

root@daya-desktop:/home/daya/tuntap-0.1# ifconfig tun0 media 100
port: SIOCSIFMAP: Operation not supported