From: Martin Kelly <mkelly@xevo.com>
Date: Tue, 5 Dec 2017 19:15:48 +0000 (-0800)
Subject: can: esd_usb2: cancel urb on -EPIPE and -EPROTO
X-Git-Tag: v3.18.88~59
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c0c6369d0f9161a7e7fe13b511b467c7dbaa26df;p=thirdparty%2Fkernel%2Fstable.git

can: esd_usb2: cancel urb on -EPIPE and -EPROTO

commit 7a31ced3de06e9878e4f9c3abe8f87d9344d8144 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>
---

diff --git a/drivers/net/can/usb/esd_usb2.c b/drivers/net/can/usb/esd_usb2.c
index 30a082842620d..195bb59c61ab1 100644
--- a/drivers/net/can/usb/esd_usb2.c
+++ b/drivers/net/can/usb/esd_usb2.c
@@ -395,6 +395,8 @@ static void esd_usb2_read_bulk_callback(struct urb *urb)
 		break;
 
 	case -ENOENT:
+	case -EPIPE:
+	case -EPROTO:
 	case -ESHUTDOWN:
 		return;