From e2db25aebe59997a31ff5d99c7e90879a9aa5efc Mon Sep 17 00:00:00 2001
From: Rostislav Lisovy <lisovy@gmail.com>
Date: Wed, 14 Dec 2011 15:52:42 +0100
Subject: [PATCH] sllin: Updating of Error counters belonging to netdevice when
 an error occurs.

---
 sllin/README.txt |  9 +++++++++
 sllin/sllin.c    | 19 ++++++++++---------
 2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/sllin/README.txt b/sllin/README.txt
index 731a301..670cd6f 100644
--- a/sllin/README.txt
+++ b/sllin/README.txt
@@ -132,6 +132,15 @@ $ cangen sllin0 -r -I 8 -n 1 -L 0
   sllin0    8  [0] remote request
   sllin0      2000  [0]
 
+$ ip -s link show dev sllin0
+14: sllin0: <NOARP,UP,LOWER_UP> mtu 16 qdisc pfifo_fast state UNKNOWN qlen 10
+    link/can 
+    RX: bytes  packets  errors  dropped overrun mcast   
+    2          4        1       0       0       0      
+    TX: bytes  packets  errors  dropped carrier collsns 
+    0          4        0       0       0       0 
+
+
 
 # ----- Configure frame cache -----
 # Configure frame cache to answer on LIN ID = 8
diff --git a/sllin/sllin.c b/sllin/sllin.c
index e075589..f10923e 100644
--- a/sllin/sllin.c
+++ b/sllin/sllin.c
@@ -230,8 +230,6 @@ static void sllin_send_canfr(struct sllin *sl, canid_t id, char *data, int len)
 
 	sl->dev->stats.rx_packets++;
 	sl->dev->stats.rx_bytes += cf.can_dlc;
-
-
 }
 
 /**
@@ -459,6 +457,16 @@ static void sllin_receive_buf(struct tty_struct *tty,
  */
 void sllin_report_error(struct sllin *sl, int err)
 {
+	switch (err) {
+		case LIN_ERR_CHECKSUM:
+			sl->dev->stats.rx_crc_errors++;
+			break;
+
+		case LIN_ERR_RX_TIMEOUT:		
+			sl->dev->stats.rx_errors++;
+			break;
+	}
+
 	sllin_send_canfr(sl, 0 | CAN_EFF_FLAG |
 		(err & ~LIN_ID_MASK), NULL, 0);
 }
@@ -905,7 +913,6 @@ int sllin_kwthread(void *ptr)
 				if (sllin_rx_validate(sl) == -1) {
 					pr_debug("sllin: RX validation failed.\n");
 					sllin_report_error(sl, LIN_ERR_CHECKSUM);
-					/* FIXME tx_stat.err++ */
 				} else {
 					/* Send CAN non-RTR frame with data */
 					pr_debug("sllin: sending NON-RTR CAN"
@@ -930,12 +937,6 @@ int sllin_kwthread(void *ptr)
 				sl->lin_state = SLSTATE_IDLE;
 				break;
 		}
-
-
-
-
-		/* sl->dev->stats.tx_packets++; send frames statistic */
-		/* netif_wake_queue(sl->dev); allow next Tx packet arrival */
 	}
 
 	hrtimer_cancel(&sl->rx_timer);
-- 
2.39.2