diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
index bea3e9858aca..ce9e6c04897f 100644
--- a/drivers/dma-buf/dma-resv.c
+++ b/drivers/dma-buf/dma-resv.c
@@ -790,8 +790,11 @@ static int __init dma_resv_lockdep(void)
 	mmap_read_lock(mm);
 	ww_acquire_init(&ctx, &reservation_ww_class);
 	ret = dma_resv_lock(&obj, &ctx);
-	if (ret == -EDEADLK)
+	if (ret) {
+		/* Only EDEADLK from the error injection is possible here */
+		WARN_ON(ret != -EDEADLK);
 		dma_resv_lock_slow(&obj, &ctx);
+	}
 	fs_reclaim_acquire(GFP_KERNEL);
 	/* for unmap_mapping_range on trylocked buffer objects in shrinkers */
 	i_mmap_lock_write(&mapping);