diff --git a/sys/dev/nvme/nvme_sim.c b/sys/dev/nvme/nvme_sim.c
--- a/sys/dev/nvme/nvme_sim.c
+++ b/sys/dev/nvme/nvme_sim.c
@@ -69,7 +69,9 @@
 
 	/*
 	 * Let the periph know the completion, and let it sort out what
-	 * it means. Make our best guess, though for the status code.
+	 * it means. Report an error or success based on SC and SCT.
+	 * We do not try to fetch additional data from the error log,
+	 * though maybe we should in the future.
 	 */
 	memcpy(&ccb->nvmeio.cpl, cpl, sizeof(*cpl));
 	ccb->ccb_h.status &= ~CAM_SIM_QUEUED;