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i915: don't map imported dma-bufs for dmar. 

The exporter should have given us pages in the correct place, avoid
the prepare object mapping phase on dmar systems.

This fixes an oops on a GM45/R600 machine, when running the intel/radeon
tests.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Dave Airlie 2012-07-31 15:58:13 +10:00 committed by Daniel Vetter
parent e47e9ad918
commit f00f979145
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/i915_gem_gtt.c
View File

@ -361,7 +361,8 @@ int i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj)
struct drm_device *dev = obj->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
if (dev_priv->mm.gtt->needs_dmar)
/* don't map imported dma buf objects */
if (dev_priv->mm.gtt->needs_dmar && !obj->sg_table)
return intel_gtt_map_memory(obj->pages,
obj->base.size >> PAGE_SHIFT,
&obj->sg_list,