[PATCH 4.19 177/191] drm/ttm: fix eviction valuable range check.

[Greg Kroah-Hartman]

From: Dave Airlie <airlied@xxxxxxxxxx>

commit fea456d82c19d201c21313864105876deabe148b upstream.

This was adding size to start, but pfn and start are in pages,
so it should be using num_pages.

Not sure this fixes anything in the real world, just noticed it
during refactoring.

Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://patchwork.freedesktop.org/patch/msgid/20201019222257.1684769-2-airlied@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/ttm/ttm_bo.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -671,7 +671,7 @@ bool ttm_bo_eviction_valuable(struct ttm
 	/* Don't evict this BO if it's outside of the
 	 * requested placement range
 	 */
-	if (place->fpfn >= (bo->mem.start + bo->mem.size) ||
+	if (place->fpfn >= (bo->mem.start + bo->mem.num_pages) ||
 	    (place->lpfn && place->lpfn <= bo->mem.start))
 		return false;