[Intel-gfx] [PATCH 5/8] drm/i915: vma NULL pointer check

[Tomas Elf]

Sometimes the iterated vma objects are NULL apparently. Be aware of this while
iterating and do early exit instead of causing a NULL pointer exception.

Signed-off-by: Tomas Elf <tomas.elf at intel.com>
---
 drivers/gpu/drm/i915/i915_gem.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 52642af..8210ae7 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -5122,9 +5122,13 @@ unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o,
 bool i915_gem_obj_is_pinned(struct drm_i915_gem_object *obj)
 {
 	struct i915_vma *vma;
-	list_for_each_entry(vma, &obj->vma_list, vma_link)
+	list_for_each_entry(vma, &obj->vma_list, vma_link) {
+		if (!vma)
+			continue;
+
 		if (vma->pin_count > 0)
 			return true;
+	}
 
 	return false;
 }
-- 
1.9.1