This is a note to let you know that I've just added the patch titled
can: ems_usb: 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-ems_usb-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 bd352e1adfe0d02d3ea7c8e3fb19183dc317e679 Mon Sep 17 00:00:00 2001
From: Martin Kelly mkelly@xevo.com Date: Tue, 5 Dec 2017 11:15:47 -0800 Subject: can: ems_usb: cancel urb on -EPIPE and -EPROTO
From: Martin Kelly mkelly@xevo.com
commit bd352e1adfe0d02d3ea7c8e3fb19183dc317e679 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/ems_usb.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/can/usb/ems_usb.c +++ b/drivers/net/can/usb/ems_usb.c @@ -288,6 +288,8 @@ static void ems_usb_read_interrupt_callb
case -ECONNRESET: /* unlink */ 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