1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 03e33707251..f6b9baa6a63 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -928,6 +928,7 @@ static int intel_wrap_ring_buffer(struct intel_ring_buffer *ring)
 
 int intel_wait_ring_buffer(struct intel_ring_buffer *ring, int n)
 {
+        int reread = 0;
         struct drm_device *dev = ring->dev;
         struct drm_i915_private *dev_priv = dev->dev_private;
         unsigned long end;
@@ -940,9 +941,8 @@ int intel_wait_ring_buffer(struct intel_ring_buffer *ring, int n)
                  * fallback to the slow and accurate path.
                  */
                 head = intel_read_status_page(ring, 4);
-                if (head < ring->actual_head)
+                if (reread)
                         head = I915_READ_HEAD(ring);
-                ring->actual_head = head;
                 ring->head = head & HEAD_ADDR;
                 ring->space = ring->head - (ring->tail + 8);
                 if (ring->space < 0)
@@ -961,6 +961,7 @@ int intel_wait_ring_buffer(struct intel_ring_buffer *ring, int n)
                 msleep(1);
                 if (atomic_read(&dev_priv->mm.wedged))
                         return -EAGAIN;
+                reread = 1;
         } while (!time_after(jiffies, end));
         trace_i915_ring_wait_end (dev);
         return -EBUSY;