This is a note to let you know that I've just added the patch titled

can: mcba_usb: cancel urb on -EPROTO

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: can-mcba_usb-cancel-urb-on-eproto.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From c7f33023308f3142433b7379718af5f0c2c322a6 Mon Sep 17 00:00:00 2001

From: Martin Kelly mkelly@xevo.com Date: Tue, 5 Dec 2017 10:34:03 -0800 Subject: can: mcba_usb: cancel urb on -EPROTO

From: Martin Kelly mkelly@xevo.com

commit c7f33023308f3142433b7379718af5f0c2c322a6 upstream.

When we unplug the device, we can see both -EPIPE and -EPROTO depending on exact timing and what system we run on. If we continue to resubmit URBs, they will immediately fail, and they can cause stalls, especially on slower CPUs.

Fix this by not resubmitting on -EPROTO, as we already do on -EPIPE.

Signed-off-by: Martin Kelly mkelly@xevo.com Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/net/can/usb/mcba_usb.c | 1 + 1 file changed, 1 insertion(+)

--- a/drivers/net/can/usb/mcba_usb.c +++ b/drivers/net/can/usb/mcba_usb.c @@ -593,6 +593,7 @@ static void mcba_usb_read_bulk_callback(

case -ENOENT: case -EPIPE: + case -EPROTO: case -ESHUTDOWN: return;

Patches currently in stable-queue which might be from mkelly@xevo.com are

queue-4.14/can-ems_usb-cancel-urb-on-epipe-and-eproto.patch queue-4.14/can-mcba_usb-fix-device-disconnect-bug.patch queue-4.14/can-esd_usb2-cancel-urb-on-epipe-and-eproto.patch queue-4.14/can-usb_8dev-cancel-urb-on-epipe-and-eproto.patch queue-4.14/can-kvaser_usb-cancel-urb-on-epipe-and-eproto.patch queue-4.14/can-mcba_usb-cancel-urb-on-eproto.patch