diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c
index ec10533..f05ea8f 100644
--- a/drivers/gpu/drm/radeon/radeon_vm.c
+++ b/drivers/gpu/drm/radeon/radeon_vm.c
@@ -924,6 +924,7 @@ int radeon_vm_bo_update(struct radeon_device *rdev,
 	if (!bo_va->it.start) {
 		dev_err(rdev->dev, "bo %p don't has a mapping in vm %p\n",
 			bo_va->bo, vm);
+		dump_stack();
 		return -EINVAL;
 	}