Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Received-SPF: SoftFail (protection.outlook.com: domain of transitioning esd.eu
 discourages use of 80.151.164.27 as permitted sender)
From:   Frank Jungclaus <frank.jungclaus@esd.eu>
To:     linux-can@vger.kernel.org, Marc Kleine-Budde <mkl@pengutronix.de>,
        Wolfgang Grandegger <wg@grandegger.com>,
        Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Cc:     =?UTF-8?q?Stefan=20M=C3=A4tje?= <stefan.maetje@esd.eu>,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        Frank Jungclaus <frank.jungclaus@esd.eu>
Subject: [PATCH 2/3] can: esd_usb: Improved behavior on esd CAN_ERROR_EXT event (2)
Date:   Mon, 19 Dec 2022 22:27:16 +0100
Message-Id: <20221219212717.1298282-1-frank.jungclaus@esd.eu>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Dec 2022 21:27:28.9767
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: a0c61598-c893-4a4d-59fa-08dae207d4e6
X-MS-Exchange-CrossTenant-Id: 5a9c3a1d-52db-4235-b74c-9fd851db2e6b
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=5a9c3a1d-52db-4235-b74c-9fd851db2e6b;Ip=[80.151.164.27];Helo=[esd-s7.esd]
X-MS-Exchange-CrossTenant-AuthSource: DB8EUR06FT007.eop-eur06.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: GV1PR03MB8710
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS
        autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Started a rework initiated by Vincents remarks "You should not report
the greatest of txerr and rxerr but the one which actually increased."
[1] and "As far as I understand, those flags should be set only when
the threshold is *reached*" [2] .

Now setting the flags for CAN_ERR_CRTL_[RT]X_WARNING and
CAN_ERR_CRTL_[RT]X_PASSIVE regarding REC and TEC, when the
appropriate threshold is reached.

Fixes: 96d8e90382dc ("can: Add driver for esd CAN-USB/2 device")
Signed-off-by: Frank Jungclaus <frank.jungclaus@esd.eu>
Link: [1] https://lore.kernel.org/all/CAMZ6RqKGBWe15aMkf8-QLf-cOQg99GQBebSm+1wEzTqHgvmNuw@mail.gmail.com/
Link: [2] https://lore.kernel.org/all/CAMZ6Rq+QBO1yTX_o6GV0yhdBj-RzZSRGWDZBS0fs7zbSTy4hmA@mail.gmail.com/
---
 drivers/net/can/usb/esd_usb.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/net/can/usb/esd_usb.c b/drivers/net/can/usb/esd_usb.c
index 5e182fadd875..09745751f168 100644
--- a/drivers/net/can/usb/esd_usb.c
+++ b/drivers/net/can/usb/esd_usb.c
@@ -255,10 +255,18 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv,
 				can_bus_off(priv->netdev);
 				break;
 			case ESD_BUSSTATE_WARN:
+				cf->can_id |= CAN_ERR_CRTL;
+				cf->data[1] = (txerr > rxerr) ?
+						CAN_ERR_CRTL_TX_WARNING :
+						CAN_ERR_CRTL_RX_WARNING;
 				priv->can.state = CAN_STATE_ERROR_WARNING;
 				priv->can.can_stats.error_warning++;
 				break;
 			case ESD_BUSSTATE_ERRPASSIVE:
+				cf->can_id |= CAN_ERR_CRTL;
+				cf->data[1] = (txerr > rxerr) ?
+						CAN_ERR_CRTL_TX_PASSIVE :
+						CAN_ERR_CRTL_RX_PASSIVE;
 				priv->can.state = CAN_STATE_ERROR_PASSIVE;
 				priv->can.can_stats.error_passive++;
 				break;
@@ -296,12 +304,6 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv,
 			/* Bit stream position in CAN frame as the error was detected */
 			cf->data[3] = ecc & SJA1000_ECC_SEG;
 
-			if (priv->can.state == CAN_STATE_ERROR_WARNING ||
-			    priv->can.state == CAN_STATE_ERROR_PASSIVE) {
-				cf->data[1] = (txerr > rxerr) ?
-					CAN_ERR_CRTL_TX_PASSIVE :
-					CAN_ERR_CRTL_RX_PASSIVE;
-			}
 			cf->data[6] = txerr;
 			cf->data[7] = rxerr;
 		}
-- 
2.25.1