int i2o_driver_dispatch (struct i2o_controller * c, u32 m);
The reply is delivered to the driver from which the original message was. This function is only called from interrupt context.
Returns 0 on success and the message should not be flushed. Returns > 0 on success and if the message should be flushed afterwords. Returns negative error code on failure (the message will be flushed too).