sna: Also discard the last-was-cpu flag when overwriting cpu damage

We interpret a FillRect that erradicates the existing damage as a
clear-event and an opportunity to see if it is worth migrating the
render commands to the GPU. This is undermined if we leave the
'prefer-cpu' flag intact.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/sna/sna_accel.c b/src/sna/sna_accel.c
index 16f0c4e7..5a9eb1e9 100644
--- a/src/sna/sna_accel.c
+++ b/src/sna/sna_accel.c
@@ -10701,10 +10701,11 @@ sna_poly_fill_rect(DrawablePtr draw, GCPtr gc, int n, xRectangle *rect)
 					       pixmap->drawable.width,
 					       pixmap->drawable.height);
 				priv->undamaged = false;
-				priv->cpu = false;
 			}
 			hint |= IGNORE_CPU;
 		}
+		if (priv->cpu_damage == NULL)
+			priv->cpu = false;
 	}
 
 	bo = sna_drawable_use_bo(draw, hint, &region.extents, &damage);