[PATCH v4 09/15] can: kvaser_usb_leaf: Fix CAN state after restart

[Jimmy Assarsson <extja@kvaser.com>]

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>
---
Changes in v4:
 - No changes

Changes in v3:
 - Rebased on 1d5eeda23f36 ("can: kvaser_usb: advertise timestamping capabilities and add ioctl support")
 - Add stable to CC
 - Add S-o-b

Changes in v2:
  - Rebased on b3b6df2c56d8 ("can: kvaser_usb: kvaser_usb_leaf: fix bittiming limits")

 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;
-- 
2.37.3