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

From: Greg Kroah-Hartman
Date: Tue Nov 03 2020 - 16:20:03 EST


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;