- if (sl->rx_cnt >= sl->rx_expect) {
- set_bit(SLF_RXEVENT, &sl->flags);
- wake_up(&sl->kwt_wq);
- pr_debug("sllin: sllin_receive_buf count %d, wakeup\n", sl->rx_cnt);
- } else {
- pr_debug("sllin: sllin_receive_buf count %d, waiting\n", sl->rx_cnt);
+ if (sl->lin_master == true) {
+ if (sl->rx_cnt >= sl->rx_expect) { /* Probably whole frame was received */
+ set_bit(SLF_RXEVENT, &sl->flags);
+ wake_up(&sl->kwt_wq);
+ pr_debug("sllin: sllin_receive_buf count %d, wakeup\n", sl->rx_cnt);
+ } else {
+ pr_debug("sllin: sllin_receive_buf count %d, waiting\n", sl->rx_cnt);
+ }
+ } else { /* LIN slave */
+ int lin_id;
+ struct sllin_conf_entry *sce;
+
+ /* Received whole header */
+ if ((sl->rx_cnt >= (SLLIN_BUFF_ID + 1)) &&
+ (sl->header_received == false))
+ {
+ lin_id = sl->rx_buff[SLLIN_BUFF_ID] & LIN_ID_MASK;
+ sce = &sl->linfr_cache[lin_id];
+
+ /* Is the length of data set in frame cache? */
+ if (sce->frame_fl & LIN_LOC_SLAVE_CACHE)
+ sl->rx_expect += sce->dlc;
+ else
+ sl->rx_expect += 2; /* 1 data byte + checksum */
+
+ sl->header_received = true;
+ sll_send_rtr(sl);
+ }
+
+ /* Probably whole frame was received */
+ if ((sl->rx_cnt >= sl->rx_expect) && (sl->rx_cnt > SLLIN_BUFF_DATA)) {
+ sll_bump(sl);
+ pr_debug("sllin: Received LIN header & LIN response. "
+ "rx_cnt = %u, rx_expect = %u\n", sl->rx_cnt,
+ sl->rx_expect);
+ sl->rx_cnt = 0;
+ sl->rx_expect = SLLIN_BUFF_ID + 1;
+ sl->header_received = false;
+ }