+ sl->id_to_send = false;
+ if (sl->data_to_send) {
+ sllin_send_tx_buff(sl);
+ sl->lin_state = SLSTATE_RESPONSE_SENT;
+ sl->rx_expect = sl->tx_lim;
+ goto slstate_response_sent;
+ } else {
+ if (sl->resp_len_known) {
+ sl->rx_expect = sl->rx_lim;
+ } else {
+ sl->rx_expect = SLLIN_BUFF_DATA + 2;
+ }
+ sl->lin_state = SLSTATE_RESPONSE_WAIT;
+ /* If we don't receive anything, timer will "unblock" us */
+ hrtimer_start(&sl->rx_timer,
+ ktime_add(ktime_get(), sl->rx_timer_timeout),
+ HRTIMER_MODE_ABS);
+ goto slstate_response_wait;
+ }
+ break;
+
+ case SLSTATE_RESPONSE_WAIT:
+ slstate_response_wait:
+ if (test_bit(SLF_MSGEVENT, &sl->flags)) {
+ unsigned char *lin_buff;
+ cf = (struct can_frame *)sl->tx_req_skb->data;
+
+ lin_buff = (sl->lin_master) ? sl->tx_buff : sl->rx_buff;
+ if (cf->can_id == (lin_buff[SLLIN_BUFF_ID] & SLLIN_ID_MASK)) {
+ if (sllin_setup_msg(sl, SLLIN_STPMSG_RESPONLY,
+ cf->can_id & SLLIN_ID_MASK,
+ cf->data, cf->can_dlc) != -1) {
+
+ sl->rx_expect = sl->tx_lim;
+ sl->data_to_send = true;
+ sl->dev->stats.tx_packets++;
+ sl->dev->stats.tx_bytes += tx_bytes;
+
+ if (!sl->lin_master) {
+ sl->tx_cnt = SLLIN_BUFF_DATA;
+ }
+
+ sllin_send_tx_buff(sl);
+ clear_bit(SLF_MSGEVENT, &sl->flags);
+ kfree_skb(sl->tx_req_skb);
+ netif_wake_queue(sl->dev);
+
+ sl->lin_state = SLSTATE_RESPONSE_SENT;
+ goto slstate_response_sent;
+ }
+ } else {
+ sl->lin_state = SLSTATE_RESPONSE_WAIT_BUS;
+ }
+ }
+
+ case SLSTATE_RESPONSE_WAIT_BUS:
+ if (sl->rx_cnt < sl->rx_expect)
+ continue;
+
+ hrtimer_cancel(&sl->rx_timer);
+ printk(KERN_INFO "sllin: response received ID %d len %d\n",
+ sl->rx_buff[SLLIN_BUFF_ID], sl->rx_cnt - SLLIN_BUFF_DATA - 1);
+
+ if (sllin_rx_validate(sl) == -1) {
+ printk("sllin: RX validation failed.\n");
+ sllin_report_error(sl, SLLIN_ERR_CHECKSUM);
+ //FIXME tx_stat.err++
+ } else {
+ // send CAN non-RTR frame with data
+ printk(KERN_INFO "sllin: sending NON-RTR CAN"
+ "frame with LIN payload.");
+ sll_bump(sl); //send packet to the network layer
+ }
+
+ sl->id_to_send = false;
+ sl->lin_state = SLSTATE_IDLE;
+ break;
+
+ case SLSTATE_RESPONSE_SENT:
+ slstate_response_sent:
+ if (sl->rx_cnt < sl->tx_lim)
+ continue;
+
+ sll_bump(sl); //send packet to the network layer
+ printk(KERN_INFO "sllin: response sent ID %d len %d\n",
+ sl->rx_buff[SLLIN_BUFF_ID], sl->rx_cnt - SLLIN_BUFF_DATA - 1);
+