Index: sys/dev/nvme/nvme_ctrlr.c
===================================================================
--- sys/dev/nvme/nvme_ctrlr.c	(revision 295664)
+++ sys/dev/nvme/nvme_ctrlr.c	(working copy)
@@ -810,7 +810,7 @@
 
 	nvme_qpair_process_completions(&ctrlr->adminq);
 
-	if (ctrlr->ioq[0].cpl)
+	if (ctrlr->ioq && ctrlr->ioq[0].cpl)
 		nvme_qpair_process_completions(&ctrlr->ioq[0]);
 
 	nvme_mmio_write_4(ctrlr, intmc, 1);