sna: Skip an empty slave update

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

1 files changed, 3 insertions, 0 deletions

diff --git a/src/sna/sna_accel.c b/src/sna/sna_accel.c
index ed13569d..99063de1 100644
--- a/src/sna/sna_accel.c
+++ b/src/sna/sna_accel.c
@@ -13821,6 +13821,9 @@ static void sna_accel_post_damage(struct sna *sna)
 		     region.extents.x2, region.extents.y2));
 
 		RegionIntersect(&region, &region, damage);
+		if (!RegionNotEmpty(&region))
+			continue;
+
 		RegionTranslate(&region, -dirty->x, -dirty->y);
 		DamageRegionAppend(&dirty->slave_dst->drawable, &region);