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

[ Upstream commit 3e4645931655776e757f9fb5ae29371cd7cb21a2 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c
index b67464df25ffeb1be0168a7069784a7cb7184bcd..1b9501ee10deb552dd7c6711cb81ccd22a29b18f 100644 (file)
--- a/drivers/net/can/spi/hi311x.c
+++ b/drivers/net/can/spi/hi311x.c
@@ -697,27 +697,38 @@ 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);
+                               }
                        }
                }