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

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Message-Id: <20171215092212.165546774@linuxfoundation.org>
Date:   Fri, 15 Dec 2017 10:21:27 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jimmy Assarsson <jimmyassarsson@...il.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 3.18 03/64] can: kvaser_usb: ratelimit errors if incomplete messages are received

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

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

From: Jimmy Assarsson <jimmyassarsson@...il.com>

commit 8bd13bd522ff7dfa0eb371921aeb417155f7a3be upstream.

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

Signed-off-by: Jimmy Assarsson <jimmyassarsson@...il.com>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 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;
 		}