From: Anssi Hannula <anssi.hannula@bitwise.fi>
To: Jimmy Assarsson <extja@kvaser.com>
Cc: linux-can@vger.kernel.org, Marc Kleine-Budde <mkl@pengutronix.de>,
linux-kernel@vger.kernel.org
Subject: [PATCH 05/12] can: kvaser_usb_leaf: Set Warning state even without bus errors
Date: Mon, 16 May 2022 16:47:41 +0300 [thread overview]
Message-ID: <20220516134748.3724796-6-anssi.hannula@bitwise.fi> (raw)
In-Reply-To: <20220516134748.3724796-1-anssi.hannula@bitwise.fi>
kvaser_usb_leaf_rx_error_update_can_state() sets error state according
to error counters when the hardware does not indicate a specific state
directly.
However, this is currently gated behind a check for
M16C_STATE_BUS_ERROR which does not always seem to be set when error
counters are increasing, and may not be set when error counters are
decreasing.
This causes the CAN_STATE_ERROR_WARNING state to not be set in some
cases even when appropriate.
Change the code to set error state from counters even without
M16C_STATE_BUS_ERROR.
The Error-Passive case seems superfluous as it is already set via
M16C_STATE_BUS_PASSIVE flag above, but it is kept for now.
Tested with 0bfd:0124 Kvaser Mini PCI Express 2xHS FW 4.18.778.
Fixes: 080f40a6fa28 ("can: kvaser_usb: Add support for Kvaser CAN/USB devices")
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
---
.../net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 20 ++++++++-----------
1 file changed, 8 insertions(+), 12 deletions(-)
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 09ade66256b2..d7f2d64a8083 100644
--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
@@ -775,20 +775,16 @@ kvaser_usb_leaf_rx_error_update_can_state(struct kvaser_usb_net_priv *priv,
new_state = CAN_STATE_BUS_OFF;
} else if (es->status & M16C_STATE_BUS_PASSIVE) {
new_state = CAN_STATE_ERROR_PASSIVE;
- } else if (es->status & M16C_STATE_BUS_ERROR) {
+ } else if ((es->status & M16C_STATE_BUS_ERROR) &&
+ cur_state >= CAN_STATE_BUS_OFF) {
/* 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)
+ } 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 {
new_state = CAN_STATE_ERROR_ACTIVE;
+ }
if (new_state != cur_state) {
tx_state = (es->txerr >= es->rxerr) ? new_state : 0;
--
2.34.1
next prev parent reply other threads:[~2022-05-16 13:55 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-16 13:47 [PATCH 00/12] can: kvaser_usb: Various fixes Anssi Hannula
2022-05-16 13:47 ` [PATCH 01/12] can: kvaser_usb_leaf: Fix overread with an invalid command Anssi Hannula
2022-05-28 7:34 ` Jimmy Assarsson
2022-05-16 13:47 ` [PATCH 02/12] can: kvaser_usb: Fix use of uninitialized completion Anssi Hannula
2022-05-28 7:34 ` Jimmy Assarsson
2022-05-16 13:47 ` [PATCH 03/12] can: kvaser_usb: Fix possible completions during init_completion Anssi Hannula
2022-05-28 7:34 ` Jimmy Assarsson
2022-05-16 13:47 ` [PATCH 04/12] can: kvaser_usb: Mark Mini PCIe 2xHS as supporting error counters Anssi Hannula
2022-05-28 7:37 ` Jimmy Assarsson
2022-05-30 10:55 ` Anssi Hannula
2022-05-16 13:47 ` Anssi Hannula [this message]
2022-05-28 7:35 ` [PATCH 05/12] can: kvaser_usb_leaf: Set Warning state even without bus errors Jimmy Assarsson
2022-05-16 13:47 ` [PATCH 06/12] can: kvaser_usb_leaf: Fix TX queue out of sync after restart Anssi Hannula
2022-05-28 7:35 ` Jimmy Assarsson
2022-05-16 13:47 ` [PATCH 07/12] can: kvaser_usb_leaf: Fix CAN state " Anssi Hannula
2022-06-06 15:31 ` Jimmy Assarsson
2022-05-16 13:47 ` [PATCH 08/12] can: kvaser_usb_leaf: Fix improved state not being reported Anssi Hannula
2022-06-06 15:32 ` Jimmy Assarsson
2022-05-16 13:47 ` [PATCH 09/12] can: kvaser_usb_leaf: Fix silently failing bus params setup Anssi Hannula
2022-05-28 7:37 ` Jimmy Assarsson
2022-05-30 10:55 ` Anssi Hannula
2022-05-16 13:47 ` [PATCH 10/12] can: kvaser_usb_leaf: Fix wrong CAN state after stopping Anssi Hannula
2022-05-28 7:35 ` Jimmy Assarsson
2022-05-16 13:47 ` [PATCH 11/12] can: kvaser_usb_leaf: Ignore stale bus-off after start Anssi Hannula
2022-06-06 15:32 ` Jimmy Assarsson
2022-05-16 13:47 ` [PATCH 12/12] can: kvaser_usb_leaf: Fix bogus restart events Anssi Hannula
2022-05-28 7:35 ` Jimmy Assarsson
2022-05-17 8:41 ` [PATCH 00/12] can: kvaser_usb: Various fixes Jimmy Assarsson
2022-05-28 7:42 ` Jimmy Assarsson
2022-05-30 10:56 ` Anssi Hannula
2022-06-06 15:33 ` Jimmy Assarsson
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