From 1972444b707d53dda2b5cf32bfc955b11cd0a529 Mon Sep 17 00:00:00 2001
From: Lu Baolu <baolu.lu@linux.intel.com>
Date: Fri, 8 Apr 2016 16:25:09 +0300
Subject: [PATCH] usb: xhci: fix wild pointers in xhci_mem_cleanup

commit 71504062a7c34838c3fccd92c447f399d3cb5797 upstream.

This patch fixes some wild pointers produced by xhci_mem_cleanup.
These wild pointers will cause system crash if xhci_mem_cleanup()
is called twice.

Reported-and-tested-by: Pengcheng Li <lpc.li@hisilicon.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: there's no xhci_hcd::ext_caps field to clear]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
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