From: Anssi Hannula anssi.hannula@bitwise.fi

can_restart() expects CMD_START_CHIP to set the error state to ERROR_ACTIVE as it calls netif_carrier_on() immediately afterwards.

Otherwise the user may immediately trigger restart again and hit a BUG_ON() in can_restart().

Fix kvaser_usb_leaf set_mode(CMD_START_CHIP) to set the expected state.

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/20220903182559.189-9-extja@kvaser.com Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de --- drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 2 ++ 1 file changed, 2 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 48b8a0f0b362..a6a26085bc15 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c @@ -1668,6 +1668,8 @@ static int kvaser_usb_leaf_set_mode(struct net_device *netdev, err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP); if (err) return err; + + priv->can.state = CAN_STATE_ERROR_ACTIVE; break; default: return -EOPNOTSUPP;