From c7f33023308f3142433b7379718af5f0c2c322a6 Mon Sep 17 00:00:00 2001
From: Martin Kelly <mkelly@xevo.com>
Date: Tue, 5 Dec 2017 10:34:03 -0800
Subject: [PATCH] can: mcba_usb: cancel urb on -EPROTO
Git-commit: c7f33023308f3142433b7379718af5f0c2c322a6
Patch-mainline: v4.15-rc3
References: bsc#1051510

When we unplug the device, we can see both -EPIPE and -EPROTO depending
on exact timing and what system we run on. If we continue to resubmit
URBs, they will immediately fail, and they can cause stalls, especially
on slower CPUs.

Fix this by not resubmitting on -EPROTO, as we already do on -EPIPE.

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/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
@@ -593,6 +593,7 @@ static void mcba_usb_read_bulk_callback(
 
 	case -ENOENT:
 	case -EPIPE:
+	case -EPROTO:
 	case -ESHUTDOWN:
 		return;