This is a note to let you know that I've just added the patch titled
can: mcba_usb: fix device disconnect bug
to the 4.14-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-mcba_usb-fix-device-disconnect-bug.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@xxxxxxxxxxxxxxx> know about it.
>From 1cb35a33a28394fd711bb26ddf3a564f4e9d9125 Mon Sep 17 00:00:00 2001
From: Martin Kelly <mkelly@xxxxxxxx>
Date: Mon, 27 Nov 2017 15:49:16 -0800
Subject: can: mcba_usb: fix device disconnect bug
From: Martin Kelly <mkelly@xxxxxxxx>
commit 1cb35a33a28394fd711bb26ddf3a564f4e9d9125 upstream.
Currently, when you disconnect the device, the driver infinitely
resubmits all URBs, so you see:
Rx URB aborted (-32)
in an infinite loop.
Fix this by catching -EPIPE (what we get in urb->status when the device
disconnects) and not resubmitting.
With this patch, I can plug and unplug many times and the driver
recovers correctly.
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/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
@@ -592,6 +592,7 @@ static void mcba_usb_read_bulk_callback(
break;
case -ENOENT:
+ case -EPIPE:
case -ESHUTDOWN:
return;
Patches currently in stable-queue which might be from mkelly@xxxxxxxx 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