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drm/i915: Catch premature unpinning of pages 

Try to catch the violation of unpinning the backing storage whilst still
bound to the GPU.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20161019101147.17342-5-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Chris Wilson 2016-10-19 11:11:39 +01:00
parent 1dc16aac8a
commit 40fa60c8af
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/i915/i915_drv.h
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@ -3181,14 +3181,15 @@ i915_gem_object_get_page(struct drm_i915_gem_object *obj, int n)
static inline void i915_gem_object_pin_pages(struct drm_i915_gem_object *obj) static inline void i915_gem_object_pin_pages(struct drm_i915_gem_object *obj)
{ {
BUG_ON(obj->pages == NULL); GEM_BUG_ON(obj->pages == NULL);
obj->pages_pin_count++; obj->pages_pin_count++;
} }
static inline void i915_gem_object_unpin_pages(struct drm_i915_gem_object *obj) static inline void i915_gem_object_unpin_pages(struct drm_i915_gem_object *obj)
{ {
BUG_ON(obj->pages_pin_count == 0); GEM_BUG_ON(obj->pages_pin_count == 0);
obj->pages_pin_count--; obj->pages_pin_count--;
GEM_BUG_ON(obj->pages_pin_count < obj->bind_count);
} }
enum i915_map_type { enum i915_map_type {