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

can: usb_8dev: cancel urb on -EPIPE and -EPROTO

to the 4.9-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-usb_8dev-cancel-urb-on-epipe-and-eproto.patch and it can be found in the queue-4.9 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 12147edc434c9e4c7c2f5fee2e5519b2e5ac34ce Mon Sep 17 00:00:00 2001

From: Martin Kelly mkelly@xevo.com Date: Tue, 5 Dec 2017 11:15:50 -0800 Subject: can: usb_8dev: cancel urb on -EPIPE and -EPROTO

From: Martin Kelly mkelly@xevo.com

commit 12147edc434c9e4c7c2f5fee2e5519b2e5ac34ce upstream.

In mcba_usb, we have observed that when you unplug the device, the driver will endlessly resubmit failing URBs, which can cause CPU stalls. This issue is fixed in mcba_usb by catching the codes seen on device disconnect (-EPIPE and -EPROTO).

This driver also resubmits in the case of -EPIPE and -EPROTO, so fix it in the same way.

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/usb_8dev.c | 2 ++ 1 file changed, 2 insertions(+)

--- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -524,6 +524,8 @@ static void usb_8dev_read_bulk_callback( break;

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

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

queue-4.9/can-ems_usb-cancel-urb-on-epipe-and-eproto.patch queue-4.9/can-esd_usb2-cancel-urb-on-epipe-and-eproto.patch queue-4.9/can-usb_8dev-cancel-urb-on-epipe-and-eproto.patch queue-4.9/can-kvaser_usb-cancel-urb-on-epipe-and-eproto.patch