Patch "can: mcba_usb: fix device disconnect bug" has been added to the 4.14-stable tree

Patch "can: mcba_usb: fix device disconnect bug" has been added to the 4.14-stable tree

[gregkh]

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@vger.kernel.org> know about it.


>From 1cb35a33a28394fd711bb26ddf3a564f4e9d9125 Mon Sep 17 00:00:00 2001
From: Martin Kelly <mkelly@xevo.com>
Date: Mon, 27 Nov 2017 15:49:16 -0800
Subject: can: mcba_usb: fix device disconnect bug

From: Martin Kelly <mkelly@xevo.com>

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@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
@@ -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@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