After an initial link up the CAN device is in ERROR-ACTIVE mode. Due to a missing CAN_STATE_STOPPED in gs_can_close() it doesn't change to STOPPED after a link down:

| ip link set dev can0 up | ip link set dev can0 down | ip --details link show can0 | 13: can0: <NOARP,ECHO> mtu 16 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 10 | link/can promiscuity 0 allmulti 0 minmtu 0 maxmtu 0 | can state ERROR-ACTIVE restart-ms 1000

Add missing assignment of CAN_STATE_STOPPED in gs_can_close().

Cc: stable@vger.kernel.org Fixes: d08e973a77d1 ("can: gs_usb: Added support for the GS_USB CAN devices") Link: https://lore.kernel.org/all/20230718-gs_usb-fix-can-state-v1-1-f19738ae2c23@... Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de --- drivers/net/can/usb/gs_usb.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c index f418066569fc..bd9eb066ecf1 100644 --- a/drivers/net/can/usb/gs_usb.c +++ b/drivers/net/can/usb/gs_usb.c @@ -1030,6 +1030,8 @@ static int gs_can_close(struct net_device *netdev) usb_kill_anchored_urbs(&dev->tx_submitted); atomic_set(&dev->active_tx_urbs, 0);

+ dev->can.state = CAN_STATE_STOPPED; + /* reset the device */ rc = gs_cmd_reset(dev); if (rc < 0)

base-commit: 9f9d4c1a2e82174a4e799ec405284a2b0de32b6a