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: [PATCH] can: mcba_usb: fix device disconnect bug
Git-commit: 1cb35a33a28394fd711bb26ddf3a564f4e9d9125
Patch-mainline: v4.15-rc3
References: bsc#1051510

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>
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
@@ -592,6 +592,7 @@ static void mcba_usb_read_bulk_callback(
 		break;
 
 	case -ENOENT:
+	case -EPIPE:
 	case -ESHUTDOWN:
 		return;