Re: hard_start_xmit behavior

["David S. Miller" <davem@xxxxxxxxxx>]

Noah Romer writes:
 > Specifically, if the network stack gives you a packet to transmit and you
 > immediately know you're not going to be able to do so (in my case, when I'm
 > unable to get a message frame so I can talk with the board, a rare 
 > condition),
 > what's the expected handling of the skb and what does the network stack want 
 > to
 > see as the return value? 

If you cannot queue the packet then:

netif_stop_queue(dev);
return 1;

And do nothing else.

Later,
David S. Miller
davem@xxxxxxxxxx