From: Anssi Hannula anssi.hannula@bitwise.fi

0bfd:0124 Kvaser Mini PCI Express 2xHS FW 4.18.778 sends a CMD_CHIP_STATE_EVENT indicating bus-off after stopping the device, causing a stopped device to appear as CAN_STATE_BUS_OFF instead of CAN_STATE_STOPPED.

Fix that by not handling error events on stopped devices.

Cc: stable@vger.kernel.org Fixes: 080f40a6fa28 ("can: kvaser_usb: Add support for Kvaser CAN/USB devices") Tested-by: Jimmy Assarsson extja@kvaser.com Signed-off-by: Anssi Hannula anssi.hannula@bitwise.fi Signed-off-by: Jimmy Assarsson extja@kvaser.com Link: https://lore.kernel.org/all/20220903182559.189-11-extja@kvaser.com Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de --- drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c index 993fcc19637d..4f9c76f4d0da 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c @@ -1045,6 +1045,10 @@ static void kvaser_usb_leaf_rx_error(const struct kvaser_usb *dev, leaf = priv->sub_priv; stats = &priv->netdev->stats;

+ /* Ignore e.g. state change to bus-off reported just after stopping */ + if (!netif_running(priv->netdev)) + return; + /* Update all of the CAN interface's state and error counters before * trying any memory allocation that can actually fail with -ENOMEM. *