The object is dereferenced before the NULL check. Oops.
Fixes http://bugs.freedesktop.org/show_bug.cgi?id=20235
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_gem.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a1c0950..1a1220d 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3282,16 +3282,20 @@ static void
i915_gem_cleanup_hws(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
- struct drm_gem_object *obj = dev_priv->hws_obj;
- struct drm_i915_gem_object *obj_priv = obj->driver_private;
+ struct drm_gem_object *obj;
+ struct drm_i915_gem_object *obj_priv;
if (dev_priv->hws_obj == NULL)
return;
+ obj = dev_priv->hws_obj;
+ obj_priv = obj->driver_private;
+
kunmap(obj_priv->page_list[0]);
i915_gem_object_unpin(obj);
drm_gem_object_unreference(obj);
dev_priv->hws_obj = NULL;
+
memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
dev_priv->hw_status_page = NULL;
--
1.6.0.4
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