From e07f0552c6adc9f36c8d07cac24adf2c87ddfd69 Mon Sep 17 00:00:00 2001
From: Michel Thierry <michel.thierry@intel.com>
Date: Tue, 19 Aug 2014 15:49:41 +0100
Subject: [PATCH] drm/i915: Handle i915_ppgtt_put correctly

Unfortunately, the gem_obj/vma relationship is not symmetrical; a gem_obj
can look up for the same vma more than once (where the ppgtt refcount is
incremented), but will free the vma only once (i915_gem_free_object).

This difference in refcount get/put means that the ppgtt is not removed
after the context and vma are destroyed, because sometimes the refcount
will never go back to zero.

v2: Just move the ppgtt refcount into vma_create.

OTC-Jira: VIZ-3719
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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