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can: peak_usb: report bus recovery as well

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While the state changes are reported when the error counters increase
and decrease, there is no event when the bus recovers and the error
counters decrease again. So add those as well.

Change the state going downward to be ERROR_PASSIVE -> ERROR_WARNING ->
ERROR_ACTIVE instead of directly to ERROR_ACTIVE again.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Cc: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Jeroen Hofstee
2019-09-25 08:58:45 +00:00
committed by Marc Kleine-Budde
parent f7a1337f0d
commit 128a1b87d3
1 changed files with 10 additions and 5 deletions
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15
drivers/net/can/usb/peak_usb/pcan_usb.c
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@ -436,8 +436,8 @@ static int pcan_usb_decode_error(struct pcan_usb_msg_context *mc, u8 n,
}
if ((n & PCAN_USB_ERROR_BUS_LIGHT) == 0) {
/* no error (back to active state) */
mc->pdev->dev.can.state = CAN_STATE_ERROR_ACTIVE;
return 0;
new_state = CAN_STATE_ERROR_ACTIVE;
break;
}
break;
@ -460,9 +460,9 @@ static int pcan_usb_decode_error(struct pcan_usb_msg_context *mc, u8 n,
}
if ((n & PCAN_USB_ERROR_BUS_HEAVY) == 0) {
/* no error (back to active state) */
mc->pdev->dev.can.state = CAN_STATE_ERROR_ACTIVE;
return 0;
/* no error (back to warning state) */
new_state = CAN_STATE_ERROR_WARNING;
break;
}
break;
@ -501,6 +501,11 @@ static int pcan_usb_decode_error(struct pcan_usb_msg_context *mc, u8 n,
mc->pdev->dev.can.can_stats.error_warning++;
break;
case CAN_STATE_ERROR_ACTIVE:
cf->can_id |= CAN_ERR_CRTL;
cf->data[1] = CAN_ERR_CRTL_ACTIVE;
break;
default:
/* CAN_STATE_MAX (trick to handle other errors) */
cf->can_id |= CAN_ERR_CRTL;