diff options
Diffstat (limited to 'drivers/net/can')
| -rw-r--r-- | drivers/net/can/usb/kvaser_usb.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/net/can/usb/kvaser_usb.c b/drivers/net/can/usb/kvaser_usb.c index 17d28d7dd412..2928f7003041 100644 --- a/drivers/net/can/usb/kvaser_usb.c +++ b/drivers/net/can/usb/kvaser_usb.c @@ -11,7 +11,7 @@ * Copyright (C) 2002-2006 KVASER AB, Sweden. All rights reserved. * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh * Copyright (C) 2012 Olivier Sobrie <olivier@sobrie.be> - * Copyright (C) 2015 Valeo A.S. + * Copyright (C) 2015 Valeo S.A. */ #include <linux/completion.h> @@ -824,14 +824,15 @@ static void kvaser_usb_rx_error_update_can_state(struct kvaser_usb_net_priv *pri else if (es->status & M16C_STATE_BUS_PASSIVE) new_state = CAN_STATE_ERROR_PASSIVE; else if (es->status & M16C_STATE_BUS_ERROR) { - if ((es->txerr >= 256) || (es->rxerr >= 256)) - new_state = CAN_STATE_BUS_OFF; - else if ((es->txerr >= 128) || (es->rxerr >= 128)) - new_state = CAN_STATE_ERROR_PASSIVE; - else if ((es->txerr >= 96) || (es->rxerr >= 96)) - new_state = CAN_STATE_ERROR_WARNING; - else if (cur_state > CAN_STATE_ERROR_ACTIVE) - new_state = CAN_STATE_ERROR_ACTIVE; + /* Guard against spurious error events after a busoff */ + if (cur_state < CAN_STATE_BUS_OFF) { + if ((es->txerr >= 128) || (es->rxerr >= 128)) + new_state = CAN_STATE_ERROR_PASSIVE; + else if ((es->txerr >= 96) || (es->rxerr >= 96)) + new_state = CAN_STATE_ERROR_WARNING; + else if (cur_state > CAN_STATE_ERROR_ACTIVE) + new_state = CAN_STATE_ERROR_ACTIVE; + } } if (!es->status) |