linux-kernel - [PATCH 5.19 0523/1157] can: usb_8dev: do not report txerr and rxerr during bus-off

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Message-Id: <20220815180500.593961196@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:57:59 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 0523/1157] can: usb_8dev: do not report txerr and rxerr during bus-off

From: Vincent Mailhol <mailhol.vincent@...adoo.fr>

[ Upstream commit aebe8a2433cd090ccdc222861f44bddb75eb01de ]

During bus off, the error count is greater than 255 and can not fit in
a u8.

Fixes: 0024d8ad1639 ("can: usb_8dev: Add support for USB2CAN interface from 8 devices")
Link: https://lore.kernel.org/all/20220719143550.3681-10-mailhol.vincent@wanadoo.fr
Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/can/usb/usb_8dev.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c
index f3363575bf32..4d38dc90472a 100644
--- a/drivers/net/can/usb/usb_8dev.c
+++ b/drivers/net/can/usb/usb_8dev.c
@@ -438,9 +438,10 @@ static void usb_8dev_rx_err_msg(struct usb_8dev_priv *priv,
 
 	if (rx_errors)
 		stats->rx_errors++;
-
-	cf->data[6] = txerr;
-	cf->data[7] = rxerr;
+	if (priv->can.state != CAN_STATE_BUS_OFF) {
+		cf->data[6] = txerr;
+		cf->data[7] = rxerr;
+	}
 
 	priv->bec.txerr = txerr;
 	priv->bec.rxerr = rxerr;
-- 
2.35.1