From: Michel Thierry <michel.thierry@intel.com>
Date: Tue, 9 Sep 2014 12:04:43 +0000 (+0100)
Subject: drm/i915: fix another use-after-free in i915_gem_evict_everything
X-Git-Tag: fixes-against-v3.18-rc2~73^2~4^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf303626748e0a5c059e453d025539583d870116;p=pandora-kernel.git

drm/i915: fix another use-after-free in i915_gem_evict_everything

Also here, i915_gem_evict_vm causes an unbind, which can end up dropping
the last ref to the ppgtt.

Triggered by igt gem_evict_everything test.

Testcase: igt/gem_evict_everything
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Chris Wilson <chris@cris-wilsonc.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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