From: Ben Widawsky Date: Fri, 31 May 2013 21:46:20 +0000 (-0700) Subject: drm/i915: Unpin stolen pages X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1d64ae719b436f2a5f8f5da801b4c560bf24aaa9;p=linux-beck.git drm/i915: Unpin stolen pages The way the stolen handling works is we take a pin on the backing pages, but we never actually get a reference to the bo. On freeing objects allocated with stolen memory, the final unref will end up freeing the object with pinned pages count left. To enable an assertion to catch bugs in this code path, this patch cleans up that remaining pin. Signed-off-by: Ben Widawsky Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 84d2aa21435a..28642a9d77cd 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3860,6 +3860,11 @@ void i915_gem_free_object(struct drm_gem_object *gem_obj) dev_priv->mm.interruptible = was_interruptible; } + /* Stolen objects don't hold a ref, but do hold pin count. Fix that up + * before progressing. */ + if (obj->stolen) + i915_gem_object_unpin_pages(obj); + obj->pages_pin_count = 0; i915_gem_object_put_pages(obj); i915_gem_object_free_mmap_offset(obj);