drm/i915: Force the domain to CPU on unbinding whilst wedged.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=30083
Reported-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 16c4b7b9602c..c033c5a2e9fc 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2158,6 +2158,10 @@ i915_gem_object_unbind(struct drm_gem_object *obj)
          * should be safe and we need to cleanup or else we might
          * cause memory corruption through use-after-free.
          */
+        if (ret) {
+                i915_gem_clflush_object(obj);
+                obj->read_domains = obj->write_domain = I915_GEM_DOMAIN_CPU;
+        }
 
         /* release the fence reg _after_ flushing */
         if (obj_priv->fence_reg != I915_FENCE_REG_NONE)