From: Mike Marciniszyn <mike.marciniszyn@intel.com>
Date: Tue, 21 Jul 2015 12:36:07 +0000 (-0400)
Subject: IB/qib: Change lkey table allocation to support more MRs
X-Git-Tag: omap-for-v4.3/fixes-rc1~52^2~133
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d6f1c17e162b2a11e708f28fa93f2f79c164b442;p=pandora-kernel.git

IB/qib: Change lkey table allocation to support more MRs

The lkey table is allocated with with a get_user_pages() with an
order based on a number of index bits from a module parameter.

The underlying kernel code cannot allocate that many contiguous pages.

There is no reason the underlying memory needs to be physically
contiguous.

This patch:
- switches the allocation/deallocation to vmalloc/vfree
- caps the number of bits to 23 to insure at least 1 generation bit
  o this matches the module parameter description

Cc: stable@vger.kernel.org
Reviewed-by: Vinit Agnihotri <vinit.abhay.agnihotri@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
---

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