From: Marc Kleine-Budde <mkl@pengutronix.de>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org,
kernel@pengutronix.de,
Dario Binacchi <dario.binacchi@amarulasolutions.com>,
Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [PATCH net 10/15] can: sja1000: sja1000_err(): fix {rx,tx}_errors statistics
Date: Mon, 2 Dec 2024 09:55:44 +0100 [thread overview]
Message-ID: <20241202090040.1110280-11-mkl@pengutronix.de> (raw)
In-Reply-To: <20241202090040.1110280-1-mkl@pengutronix.de>
From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
The sja1000_err() function only incremented the receive error counter
and never the transmit error counter, even if the ECC_DIR flag reported
that an error had occurred during transmission.
Increment the receive/transmit error counter based on the value of the
ECC_DIR flag.
Fixes: 429da1cc841b ("can: Driver for the SJA1000 CAN controller")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://patch.msgid.link/20241122221650.633981-10-dario.binacchi@amarulasolutions.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/sja1000/sja1000.c | 65 ++++++++++++++++++-------------
1 file changed, 38 insertions(+), 27 deletions(-)
diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c
index ddb3247948ad..4d245857ef1c 100644
--- a/drivers/net/can/sja1000/sja1000.c
+++ b/drivers/net/can/sja1000/sja1000.c
@@ -416,8 +416,6 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
int ret = 0;
skb = alloc_can_err_skb(dev, &cf);
- if (skb == NULL)
- return -ENOMEM;
txerr = priv->read_reg(priv, SJA1000_TXERR);
rxerr = priv->read_reg(priv, SJA1000_RXERR);
@@ -425,8 +423,11 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
if (isrc & IRQ_DOI) {
/* data overrun interrupt */
netdev_dbg(dev, "data overrun interrupt\n");
- cf->can_id |= CAN_ERR_CRTL;
- cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
+ if (skb) {
+ cf->can_id |= CAN_ERR_CRTL;
+ cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
+ }
+
stats->rx_over_errors++;
stats->rx_errors++;
sja1000_write_cmdreg(priv, CMD_CDO); /* clear bit */
@@ -452,7 +453,7 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
else
state = CAN_STATE_ERROR_ACTIVE;
}
- if (state != CAN_STATE_BUS_OFF) {
+ if (state != CAN_STATE_BUS_OFF && skb) {
cf->can_id |= CAN_ERR_CNT;
cf->data[6] = txerr;
cf->data[7] = rxerr;
@@ -460,33 +461,38 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
if (isrc & IRQ_BEI) {
/* bus error interrupt */
priv->can.can_stats.bus_error++;
- stats->rx_errors++;
ecc = priv->read_reg(priv, SJA1000_ECC);
+ if (skb) {
+ cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
- cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
+ /* set error type */
+ switch (ecc & ECC_MASK) {
+ case ECC_BIT:
+ cf->data[2] |= CAN_ERR_PROT_BIT;
+ break;
+ case ECC_FORM:
+ cf->data[2] |= CAN_ERR_PROT_FORM;
+ break;
+ case ECC_STUFF:
+ cf->data[2] |= CAN_ERR_PROT_STUFF;
+ break;
+ default:
+ break;
+ }
- /* set error type */
- switch (ecc & ECC_MASK) {
- case ECC_BIT:
- cf->data[2] |= CAN_ERR_PROT_BIT;
- break;
- case ECC_FORM:
- cf->data[2] |= CAN_ERR_PROT_FORM;
- break;
- case ECC_STUFF:
- cf->data[2] |= CAN_ERR_PROT_STUFF;
- break;
- default:
- break;
+ /* set error location */
+ cf->data[3] = ecc & ECC_SEG;
}
- /* set error location */
- cf->data[3] = ecc & ECC_SEG;
-
/* Error occurred during transmission? */
- if ((ecc & ECC_DIR) == 0)
- cf->data[2] |= CAN_ERR_PROT_TX;
+ if ((ecc & ECC_DIR) == 0) {
+ stats->tx_errors++;
+ if (skb)
+ cf->data[2] |= CAN_ERR_PROT_TX;
+ } else {
+ stats->rx_errors++;
+ }
}
if (isrc & IRQ_EPI) {
/* error passive interrupt */
@@ -502,8 +508,10 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
netdev_dbg(dev, "arbitration lost interrupt\n");
alc = priv->read_reg(priv, SJA1000_ALC);
priv->can.can_stats.arbitration_lost++;
- cf->can_id |= CAN_ERR_LOSTARB;
- cf->data[0] = alc & 0x1f;
+ if (skb) {
+ cf->can_id |= CAN_ERR_LOSTARB;
+ cf->data[0] = alc & 0x1f;
+ }
}
if (state != priv->can.state) {
@@ -516,6 +524,9 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
can_bus_off(dev);
}
+ if (!skb)
+ return -ENOMEM;
+
netif_rx(skb);
return ret;
--
2.45.2
next prev parent reply other threads:[~2024-12-02 9:00 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-02 8:55 [PATCH net 0/15] pull-request: can 2024-12-02 Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 01/15] can: dev: can_set_termination(): allow sleeping GPIOs Marc Kleine-Budde
2024-12-03 2:10 ` patchwork-bot+netdevbpf
2024-12-02 8:55 ` [PATCH net 02/15] can: gs_usb: add usb endpoint address detection at driver probe step Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 03/15] can: c_can: c_can_handle_bus_err(): update statistics if skb allocation fails Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 04/15] can: sun4i_can: sun4i_can_err(): call can_change_state() even if cf is NULL Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 05/15] can: hi311x: hi3110_can_ist(): fix potential use-after-free Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 06/15] can: hi311x: hi3110_can_ist(): update state error statistics if skb allocation fails Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 07/15] can: m_can: m_can_handle_lec_err(): fix {rx,tx}_errors statistics Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 08/15] can: ifi_canfd: ifi_canfd_handle_lec_err(): " Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 09/15] can: hi311x: hi3110_can_ist(): " Marc Kleine-Budde
2024-12-02 8:55 ` Marc Kleine-Budde [this message]
2024-12-02 8:55 ` [PATCH net 11/15] can: sun4i_can: sun4i_can_err(): " Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 12/15] can: ems_usb: ems_usb_rx_err(): " Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 13/15] can: f81604: f81604_handle_can_bus_errors(): " Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 14/15] can: mcp251xfd: mcp251xfd_get_tef_len(): work around erratum DS80000789E 6 Marc Kleine-Budde
2024-12-02 8:55 ` [PATCH net 15/15] can: j1939: j1939_session_new(): fix skb reference counting Marc Kleine-Budde
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