From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Date: Fri, 22 Nov 2024 22:15:49 +0000 (+0100)
Subject: can: hi311x: hi3110_can_ist(): fix {rx,tx}_errors statistics
X-Git-Tag: v6.13-rc2~24^2~24^2~2^2~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3e4645931655776e757f9fb5ae29371cd7cb21a2;p=thirdparty%2Fkernel%2Flinux.git

can: hi311x: hi3110_can_ist(): fix {rx,tx}_errors statistics

The hi3110_can_ist() function was incorrectly incrementing only the
receive error counter, even in cases of bit or acknowledgment errors that
occur during transmission.

The fix the issue by incrementing the appropriate counter based on the
type of error.

Fixes: 57e83fb9b746 ("can: hi311x: Add Holt HI-311x CAN driver")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://patch.msgid.link/20241122221650.633981-9-dario.binacchi@amarulasolutions.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---

diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c
index 25d9b32f57011..09ae218315d73 100644
--- a/drivers/net/can/spi/hi311x.c
+++ b/drivers/net/can/spi/hi311x.c
@@ -696,27 +696,38 @@ static irqreturn_t hi3110_can_ist(int irq, void *dev_id)
 			/* Check for protocol errors */
 			if (eflag & HI3110_ERR_PROTOCOL_MASK) {
 				skb = alloc_can_err_skb(net, &cf);
-				if (!skb)
-					break;
+				if (skb)
+					cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
 
-				cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
 				priv->can.can_stats.bus_error++;
-				priv->net->stats.rx_errors++;
-				if (eflag & HI3110_ERR_BITERR)
-					cf->data[2] |= CAN_ERR_PROT_BIT;
-				else if (eflag & HI3110_ERR_FRMERR)
-					cf->data[2] |= CAN_ERR_PROT_FORM;
-				else if (eflag & HI3110_ERR_STUFERR)
-					cf->data[2] |= CAN_ERR_PROT_STUFF;
-				else if (eflag & HI3110_ERR_CRCERR)
-					cf->data[3] |= CAN_ERR_PROT_LOC_CRC_SEQ;
-				else if (eflag & HI3110_ERR_ACKERR)
-					cf->data[3] |= CAN_ERR_PROT_LOC_ACK;
-
-				cf->data[6] = hi3110_read(spi, HI3110_READ_TEC);
-				cf->data[7] = hi3110_read(spi, HI3110_READ_REC);
+				if (eflag & HI3110_ERR_BITERR) {
+					priv->net->stats.tx_errors++;
+					if (skb)
+						cf->data[2] |= CAN_ERR_PROT_BIT;
+				} else if (eflag & HI3110_ERR_FRMERR) {
+					priv->net->stats.rx_errors++;
+					if (skb)
+						cf->data[2] |= CAN_ERR_PROT_FORM;
+				} else if (eflag & HI3110_ERR_STUFERR) {
+					priv->net->stats.rx_errors++;
+					if (skb)
+						cf->data[2] |= CAN_ERR_PROT_STUFF;
+				} else if (eflag & HI3110_ERR_CRCERR) {
+					priv->net->stats.rx_errors++;
+					if (skb)
+						cf->data[3] |= CAN_ERR_PROT_LOC_CRC_SEQ;
+				} else if (eflag & HI3110_ERR_ACKERR) {
+					priv->net->stats.tx_errors++;
+					if (skb)
+						cf->data[3] |= CAN_ERR_PROT_LOC_ACK;
+				}
+
 				netdev_dbg(priv->net, "Bus Error\n");
-				netif_rx(skb);
+				if (skb) {
+					cf->data[6] = hi3110_read(spi, HI3110_READ_TEC);
+					cf->data[7] = hi3110_read(spi, HI3110_READ_REC);
+					netif_rx(skb);
+				}
 			}
 		}