[eepro100] mtu > 1500 packet ?

[sysadm@CHS.twbbs.org]

Does anybody know that can eepro100 (intel 8255x) NIC handle packet
size > 1500?  
i am trying to send packet > 1500 bytes for my special case. I don't need 
to compatible with other system. I am using linux kernel 2.2.17. 
i have changed the mtu to 1600 in driver/net/net_init.c but it doesn't
work. The packet doesn't be sent out after dev_queue_xmit(skb).

here is my code:
void send_big_frame()
{
       struct sk_buff *skb2;

       skb2=alloc_skb( 1536,GFP_ATOMIC ); 
       skb2->mac.raw = skb2->h.raw = skb2->nh.raw = skb2->data;
       memcpy(skb2->mac.ethernet->h_dest , dstmac , 6);
       memcpy(skb2->mac.ethernet->h_source,srcmac , 6);
       skb2->mac.ethernet->h_proto = htons(0x0808); 
       dev_queue_xmit(skb2); 
}


eth0      Link encap:Ethernet  HWaddr 00:AF:00:00:01:45
          inet addr:140.113.216.10  Bcast:140.113.216.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1600  Metric:1
          RX packets:231837 errors:0 dropped:0 overruns:0 frame:0
          TX packets:20571 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          Interrupt:12 Base address:0xe800