Assert that the node is correctly aligned and that we are within the
bounds of the VM.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_gem_evict.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c
b/drivers/gpu/drm/i915/i915_gem_evict.c
index c181b1bb3d2c..e3f9d377c8c9 100644
--- a/drivers/gpu/drm/i915/i915_gem_evict.c
+++ b/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -258,6 +258,9 @@ int i915_gem_evict_for_node(struct i915_address_space *vm,
int ret = 0;
lockdep_assert_held(&vm->i915->drm.struct_mutex);
+ GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE));
+ GEM_BUG_ON(!IS_ALIGNED(end, I915_GTT_PAGE_SIZE));
+
trace_i915_gem_evict_node(vm, target, flags);
/* Retire before we search the active list. Although we have
@@ -276,8 +279,13 @@ int i915_gem_evict_for_node(struct i915_address_space *vm,
if (end < vm->start + vm->total)
end += I915_GTT_PAGE_SIZE;
}
+ GEM_BUG_ON(start < vm->start);
+ GEM_BUG_ON(end > vm->start + vm->total);
+ GEM_BUG_ON(start >= end);
drm_mm_for_each_node_in_range(node, &vm->mm, start, end) {
+ GEM_BUG_ON(!node->allocated);
+
/* If we find any non-objects (!vma), we cannot evict them */
if (node->color == I915_COLOR_UNEVICTABLE) {
ret = -ENOSPC;
--
2.11.0
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