4.19-stable review patch. If anyone has any objections, please let me know.
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From: Dario Binacchi dario.binacchi@amarulasolutions.com
[ 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@amarulasolutions.com Link: https://patch.msgid.link/20241014135319.2009782-1-dario.binacchi@amarulasolu... Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/can/c_can/c_can.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
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;