diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 5fa3419461c5ddb46fa2b70b797b8c4ad3567e59..b55eee38af7687a0182cb9a887c495aa94119bc5 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1409,6 +1409,7 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 	case -ENOMEM:
 		return VM_FAULT_OOM;
 	default:
+		WARN_ON_ONCE(ret);
 		return VM_FAULT_SIGBUS;
 	}
 }