commit b03b99a329a14b7302f37c3ea6da3848db41c8c5
author Dan Williams <dan.j.williams@intel.com> Mon Mar 27 21:53:38 2017 -0700
committer Dan Williams <dan.j.williams@intel.com> Mon Mar 27 21:53:38 2017 -0700
tree 7f4d5164748558d07dbc39fad1c6e92ad0826c81
parent c02ed2e75ef4c74e41e421acb4ef1494671585e8

acpi, nfit, libnvdimm: fix interleave set cookie calculation (64-bit comparison)

While reviewing the -stable patch for commit 86ef58a4e35e "nfit,
libnvdimm: fix interleave set cookie calculation" Ben noted:

    "This is returning an int, thus it's effectively doing a 32-bit
     comparison and not the 64-bit comparison you say is needed."

Update the compare operation to be immune to this integer demotion problem.

Cc: <stable@vger.kernel.org>
Cc: Nicholas Moulin <nicholas.w.moulin@linux.intel.com>
Fixes: 86ef58a4e35e ("nfit, libnvdimm: fix interleave set cookie calculation")
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>