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: [PATCH] can: ems_usb: cancel urb on -EPIPE and -EPROTO
Git-commit: bd352e1adfe0d02d3ea7c8e3fb19183dc317e679
Patch-mainline: v4.15-rc3
References: bsc#1051510

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>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 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;