[PATCH 3.18 03/64] can: kvaser_usb: ratelimit errors if incomplete messages are received

From: Greg Kroah-Hartman
Date: Fri Dec 15 2017 - 04:23:14 EST


3.18-stable review patch. If anyone has any objections, please let me know.

------------------

From: Jimmy Assarsson <jimmyassarsson@xxxxxxxxx>

commit 8bd13bd522ff7dfa0eb371921aeb417155f7a3be upstream.

Avoid flooding the kernel log with "Formate error", if incomplete message
are received.

Signed-off-by: Jimmy Assarsson <jimmyassarsson@xxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/net/can/usb/kvaser_usb.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/net/can/usb/kvaser_usb.c
+++ b/drivers/net/can/usb/kvaser_usb.c
@@ -415,8 +415,8 @@ static int kvaser_usb_wait_msg(const str
}

if (pos + tmp->len > actual_len) {
- dev_err(dev->udev->dev.parent,
- "Format error\n");
+ dev_err_ratelimited(dev->udev->dev.parent,
+ "Format error\n");
break;
}

@@ -1007,7 +1007,8 @@ static void kvaser_usb_read_bulk_callbac
}

if (pos + msg->len > urb->actual_length) {
- dev_err(dev->udev->dev.parent, "Format error\n");
+ dev_err_ratelimited(dev->udev->dev.parent,
+ "Format error\n");
break;
}