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drm/i915: Decouple the object from the unbound list before freeing pages

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As we may actually allocate in order to save the physical swizzling bits
during the free, we have to be careful not to trigger the shrinker on
the same object.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Added a small comment in the code to really drive the
scariness of this patch home.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2012-12-03 11:49:00 +00:00 committed by Daniel Vetter
parent 7b01e260a6
commit a2165e3123
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/i915/i915_gem.c
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@ -1696,10 +1696,14 @@ i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
if (obj->pages_pin_count)
return -EBUSY;
/* ->put_pages might need to allocate memory for the bit17 swizzle
* array, hence protect them from being reaped by removing them from gtt
* lists early. */
list_del(&obj->gtt_list);
ops->put_pages(obj);
obj->pages = NULL;
list_del(&obj->gtt_list);
if (i915_gem_object_is_purgeable(obj))
i915_gem_object_truncate(obj);