drm/nv50: fix iommu errors caused by device reading from address 0

[safe/jmp/linux-2.6] / drivers / gpu / drm / drm_mm.c

diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index cdec329..2ac074c 100644 (file)
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -405,7 +405,8 @@ struct drm_mm_node *drm_mm_search_free_in_range(const struct drm_mm *mm,
                                wasted += alignment - tmp;
                }
 
-               if (entry->size >= size + wasted) {
+               if (entry->size >= size + wasted &&
+                   (entry->start + wasted + size) <= end) {
                        if (!best_match)
                                return entry;
                        if (entry->size < best_size) {