This is a note to let you know that I've just added the patch titled
can: c_can: fix {rx,tx}_errors statistics
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
can-c_can-fix-rx-tx-_errors-statistics.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7ad76cf670c0ac6fc5160c65daefcc735d1fdb64
Author: Dario Binacchi <dario.binacchi@xxxxxxxxxxxxxxxxxxxx>
Date: Mon Oct 14 15:53:13 2024 +0200
can: c_can: fix {rx,tx}_errors statistics
[ Upstream commit 4d6d26537940f3b3e17138987ed9e4a334780bf7 ]
The c_can_handle_bus_err() function was incorrectly incrementing only the
receive error counter, even in cases of bit or acknowledgment errors that
occur during transmission. The patch fixes the issue by incrementing the
appropriate counter based on the type of error.
Fixes: 881ff67ad450 ("can: c_can: Added support for Bosch C_CAN controller")
Signed-off-by: Dario Binacchi <dario.binacchi@xxxxxxxxxxxxxxxxxxxx>
Link: https://patch.msgid.link/20241014135319.2009782-1-dario.binacchi@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c
index 2278c5fff5c69..8e72c379740c7 100644
--- a/drivers/net/can/c_can/c_can.c
+++ b/drivers/net/can/c_can/c_can.c
@@ -991,7 +991,6 @@ static int c_can_handle_bus_err(struct net_device *dev,
/* common for all type of bus errors */
priv->can.can_stats.bus_error++;
- stats->rx_errors++;
/* propagate the error condition to the CAN stack */
skb = alloc_can_err_skb(dev, &cf);
@@ -1008,26 +1007,32 @@ static int c_can_handle_bus_err(struct net_device *dev,
case LEC_STUFF_ERROR:
netdev_dbg(dev, "stuff error\n");
cf->data[2] |= CAN_ERR_PROT_STUFF;
+ stats->rx_errors++;
break;
case LEC_FORM_ERROR:
netdev_dbg(dev, "form error\n");
cf->data[2] |= CAN_ERR_PROT_FORM;
+ stats->rx_errors++;
break;
case LEC_ACK_ERROR:
netdev_dbg(dev, "ack error\n");
cf->data[3] = CAN_ERR_PROT_LOC_ACK;
+ stats->tx_errors++;
break;
case LEC_BIT1_ERROR:
netdev_dbg(dev, "bit1 error\n");
cf->data[2] |= CAN_ERR_PROT_BIT1;
+ stats->tx_errors++;
break;
case LEC_BIT0_ERROR:
netdev_dbg(dev, "bit0 error\n");
cf->data[2] |= CAN_ERR_PROT_BIT0;
+ stats->tx_errors++;
break;
case LEC_CRC_ERROR:
netdev_dbg(dev, "CRC error\n");
cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
+ stats->rx_errors++;
break;
default:
break;
