drm/i915: NULL aliasing_ppgtt on cleanup

This will allow us to carry on if we've cleaned up the PPGTT. The usage
for this is coming up - it simplifies handling a failed PPGTT init.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Spill the secrets about failing ppgtt init.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index c56de21af910f13d33ccd7335990cdd5c0649293..d32912e07bad09648ba4360a50ee5035411d6575 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -316,6 +316,7 @@ void i915_gem_cleanup_aliasing_ppgtt(struct drm_device *dev)
                return;
 
        ppgtt->cleanup(ppgtt);
+       dev_priv->mm.aliasing_ppgtt = NULL;
 }
 
 void i915_ppgtt_bind_object(struct i915_hw_ppgtt *ppgtt,