exa: the extent of the valid region is probably much larger than that of the pending damage.

- Since the default has been changed from nothing to everything.

1 files changed, 3 insertions, 13 deletions

diff --git a/exa/exa_migration.c b/exa/exa_migration.c
index 9d0eda0de..36b1a8c08 100644
--- a/exa/exa_migration.c
+++ b/exa/exa_migration.c
@@ -174,23 +174,13 @@ exaCopyDirty(ExaMigrationPtr migrate, RegionPtr pValidDst, RegionPtr pValidSrc,
 #endif
 
 	    /* Try to prevent destination valid region from growing too many
-	     * rects by filling it up to the extents of the union of the
-	     * destination valid region and the pending damage region.
+	     * rects by filling it up to the extents of the pending damage region.
 	     */
 	    if (REGION_NUM_RECTS(pValidDst) > 10) {
-		BoxRec box;
-		BoxPtr pValidExt, pDamageExt;
+		BoxPtr pDamageExt = REGION_EXTENTS(pScreen, pending_damage);
 		RegionRec closure;
 
-		pValidExt = REGION_EXTENTS(pScreen, pValidDst);
-		pDamageExt = REGION_EXTENTS(pScreen, pending_damage);
-
-		box.x1 = min(pValidExt->x1, pDamageExt->x1);
-		box.y1 = min(pValidExt->y1, pDamageExt->y1);
-		box.x2 = max(pValidExt->x2, pDamageExt->x2);
-		box.y2 = max(pValidExt->y2, pDamageExt->y2);
-
-		REGION_INIT(pScreen, &closure, &box, 0);
+		REGION_INIT(pScreen, &closure, pDamageExt, 0);
 		REGION_INTERSECT(pScreen, &CopyReg, &CopyReg, &closure);
 	    } else
 		REGION_INTERSECT(pScreen, &CopyReg, &CopyReg, pending_damage);