This is a note to let you know that I've just added the patch titled can: esd_usb2: Fix can_dlc value for received RTR, frames to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: can-esd_usb2-fix-can_dlc-value-for-received-rtr-frames.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 72d92e865d1560723e1957ee3f393688c49ca5bf Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Stefan=20M=C3=A4tje?= <Stefan.Maetje@xxxxxx> Date: Wed, 18 Oct 2017 13:25:17 +0200 Subject: can: esd_usb2: Fix can_dlc value for received RTR, frames MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Stefan Mätje <Stefan.Maetje@xxxxxx> commit 72d92e865d1560723e1957ee3f393688c49ca5bf upstream. The dlc member of the struct rx_msg contains also the ESD_RTR flag to mark received RTR frames. Without the fix the can_dlc value for received RTR frames would always be set to 8 by get_can_dlc() instead of the received value. Fixes: 96d8e90382dc ("can: Add driver for esd CAN-USB/2 device") Signed-off-by: Stefan Mätje <stefan.maetje@xxxxxx> Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/can/usb/esd_usb2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/can/usb/esd_usb2.c +++ b/drivers/net/can/usb/esd_usb2.c @@ -333,7 +333,7 @@ static void esd_usb2_rx_can_msg(struct e } cf->can_id = id & ESD_IDMASK; - cf->can_dlc = get_can_dlc(msg->msg.rx.dlc); + cf->can_dlc = get_can_dlc(msg->msg.rx.dlc & ~ESD_RTR); if (id & ESD_EXTID) cf->can_id |= CAN_EFF_FLAG; Patches currently in stable-queue which might be from Stefan.Maetje@xxxxxx are queue-4.13/can-esd_usb2-fix-can_dlc-value-for-received-rtr-frames.patch