Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
net/can/j1939/transport.c | 25 +++++++++++++++++++------
1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
index f68ed8fa9026..cd237655526f 100644
--- a/net/can/j1939/transport.c
+++ b/net/can/j1939/transport.c
@@ -69,13 +69,26 @@ struct j1939_session {
bool transmission;
bool extd;
unsigned int total_message_size; /* Total message size, number of bytes */
+
+ /* Packets counters for a (extended) transfer session. The packet is
+ * maximal of 7 bytes. */
struct {
- /* these do not require 16 bit, they should fit in u8
- * but putting in int makes it easier to deal with
- */
- unsigned int total, done, last, tx;
- unsigned int block; /* for TP */
- unsigned int dpo; /* for ETP */
+ /* total - total number of packets for this session */
+ unsigned int total;
+ /* last - last packet of a transfer block after which responder
+ * should send ETP.CM_CTS and originator ETP.CM_DPO */
+ unsigned int last;
+ /* tx - number of packets send by originator node.
+ * this counter can be set back if responder node didn't
+ * received all packets send by originator. */
+ unsigned int tx;
+ /* done - number of packets received and confirmed by
+ * responder */
+ unsigned int done;
+ /* block - amount of packets expected in one block */
+ unsigned int block;
+ /* dpo - ETP.CM_DPO, Data Packet Offset */
+ unsigned int dpo;
} pkt;
struct hrtimer txtimer, rxtimer;
};
--
2.19.1
