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drm/i915: Guard pages being reaped by OOM whilst binding-to-GTT

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In the circumstances that the shrinker is allowed to steal the mutex
in order to reap pages, we need to be careful to prevent it operating on
the current object and shooting ourselves in the foot.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2012-11-20 10:45:16 +00:00 committed by Daniel Vetter
parent be7cb6347e
commit fbdda6fb5e
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/i915/i915_gem.c
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@ -2925,6 +2925,8 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
if (ret)
return ret;
i915_gem_object_pin_pages(obj);
search_free:
if (map_and_fenceable)
free_space =
@ -2955,14 +2957,17 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
obj->cache_level,
map_and_fenceable,
nonblocking);
if (ret)
if (ret) {
i915_gem_object_unpin_pages(obj);
return ret;
}
goto search_free;
}
if (WARN_ON(!i915_gem_valid_gtt_space(dev,
obj->gtt_space,
obj->cache_level))) {
i915_gem_object_unpin_pages(obj);
drm_mm_put_block(obj->gtt_space);
obj->gtt_space = NULL;
return -EINVAL;
@ -2971,6 +2976,7 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
ret = i915_gem_gtt_prepare_object(obj);
if (ret) {
i915_gem_object_unpin_pages(obj);
drm_mm_put_block(obj->gtt_space);
obj->gtt_space = NULL;
return ret;
@ -2993,6 +2999,7 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
obj->map_and_fenceable = mappable && fenceable;
i915_gem_object_unpin_pages(obj);
trace_i915_gem_object_bind(obj, map_and_fenceable);
i915_gem_verify_gtt(dev);
return 0;