drm/i915: Mappable_end can't ever be > end
Both DRI1 and DRI2 can never specify a mappable size which goes past the
GTT size. Don't pretend otherwise.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 3ffcf52..e66c700 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -536,6 +536,8 @@
struct drm_i915_gem_object *obj;
unsigned long hole_start, hole_end;
+ BUG_ON(mappable_end > end);
+
/* Subtract the guard page ... */
drm_mm_init(&dev_priv->mm.gtt_space, start, end - start - PAGE_SIZE);
if (!HAS_LLC(dev))
@@ -557,7 +559,7 @@
dev_priv->mm.gtt_start = start;
dev_priv->mm.gtt_mappable_end = mappable_end;
dev_priv->mm.gtt_total = end - start;
- dev_priv->mm.mappable_gtt_total = min(end, mappable_end) - start;
+ dev_priv->mm.mappable_gtt_total = mappable_end - start;
/* Clear any non-preallocated blocks */
drm_mm_for_each_hole(entry, &dev_priv->mm.gtt_space,