drm/i915: Prevent stalling for a GTT read back from a read-only GPU target
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 590d8f2..7b37c19 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -729,6 +729,12 @@
unsigned int dirty : 1;
/**
+ * This is set if the object has been written to since the last
+ * GPU flush.
+ */
+ unsigned int pending_gpu_write : 1;
+
+ /**
* Fence register bits (if any) for this object. Will be set
* as needed when mapped into the GTT.
* Protected by dev->struct_mutex.