From aed2c03c8d96ea471b86761129c213e05ab6fbef Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@gmail.com>
Date: Fri, 26 Jul 2013 12:09:32 +0200
Subject: [PATCH] drm/gem: fix mmap vma size calculations

The VMA manager is page-size based so drm_vma_node_size() returns the size
in pages. However, drm_gem_mmap_obj() requires the size in bytes. Apply
PAGE_SHIFT so we no longer get EINVAL during mmaps due to too small
buffers.

This bug was introduced in commit:
  0de23977cfeb5b357ec884ba15417ae118ff9e9b
  "drm/gem: convert to new unified vma manager"

Fixes i915 gtt mmap failure reported by Sedat Dilek in:
  Re: linux-next: Tree for Jul 25 [ call-trace: drm | drm-intel related? ]

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
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