From: "Stefan Günther" <stefangun@pm.me>
To: mkl@pengutronix.de, mailhol@kernel.org
Cc: linux-can@vger.kernel.org, linux-kernel@vger.kernel.org,
"Stefan Günther" <stefangun@pm.me>
Subject: [PATCH] can: peak_usb: fix missing CAN_ERR_FLAG when reporting error counters
Date: Tue, 15 Sep 2026 13:45:56 +0000 [thread overview]
Message-ID: <20260915134551.54038-1-stefangun@pm.me> (raw)
When the device reports error counters, the driver incorrectly uses an
assignment (=) instead of a bitwise OR (|=) for CAN_ERR_CNT. This wipes
out the CAN_ERR_FLAG and CAN_ERR_CRTL flags, causing the error frame to
be sent to userspace as a regular CAN frame with ID 0x200.
Fix this by using a bitwise OR to preserve the flags.
Signed-off-by: Stefan Günther <stefangun@pm.me>
---
drivers/net/can/usb/peak_usb/pcan_usb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb.c b/drivers/net/can/usb/peak_usb/pcan_usb.c
index 9278a1522..235cf34d4 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb.c
@@ -526,7 +526,7 @@ static int pcan_usb_decode_error(struct pcan_usb_msg_context *mc, u8 n,
/* Supply TX/RX error counters in case of
* controller error.
*/
- cf->can_id = CAN_ERR_CNT;
+ cf->can_id |= CAN_ERR_CNT;
cf->data[6] = mc->pdev->bec.txerr;
cf->data[7] = mc->pdev->bec.rxerr;
}
--
2.43.0
reply other threads:[~2026-09-15 13:46 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260915134551.54038-1-stefangun@pm.me \
--to=stefangun@pm.me \
--cc=linux-can@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mailhol@kernel.org \
--cc=mkl@pengutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox