This is a note to let you know that I've just added the patch titled
can: kvaser_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;a=summary
The filename of the patch is:
can-kvaser_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@xxxxxxxxxxxxxxx> know about it.
>From 6aa8d5945502baf4687d80de59b7ac865e9e666b Mon Sep 17 00:00:00 2001
From: Martin Kelly <mkelly@xxxxxxxx>
Date: Tue, 5 Dec 2017 11:15:49 -0800
Subject: can: kvaser_usb: cancel urb on -EPIPE and -EPROTO
From: Martin Kelly <mkelly@xxxxxxxx>
commit 6aa8d5945502baf4687d80de59b7ac865e9e666b 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@xxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/can/usb/kvaser_usb.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/net/can/usb/kvaser_usb.c
+++ b/drivers/net/can/usb/kvaser_usb.c
@@ -1326,6 +1326,8 @@ static void kvaser_usb_read_bulk_callbac
case 0:
break;
case -ENOENT:
+ case -EPIPE:
+ case -EPROTO:
case -ESHUTDOWN:
return;
default:
Patches currently in stable-queue which might be from mkelly@xxxxxxxx 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