From d2b754e0c54d70dbce68a5d758b0a2417e7198cc Mon Sep 17 00:00:00 2001
From: christos <christos@NetBSD.org>
Date: Mon, 7 Mar 2016 00:16:48 +0000
Subject: [PATCH] Return instead of crashing. This is wrong, and should be
 fixed properly.

---
 sys/arch/sparc64/dev/iommu.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/sys/arch/sparc64/dev/iommu.c b/sys/arch/sparc64/dev/iommu.c
index f9716b4d3ab8..35cfc67101a9 100644
--- a/sys/arch/sparc64/dev/iommu.c
+++ b/sys/arch/sparc64/dev/iommu.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: iommu.c,v 1.111 2016/03/07 00:11:33 christos Exp $	*/
+/*	$NetBSD: iommu.c,v 1.112 2016/03/07 00:16:48 christos Exp $	*/
 
 /*
  * Copyright (c) 1999, 2000 Matthew R. Green
@@ -59,7 +59,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: iommu.c,v 1.111 2016/03/07 00:11:33 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: iommu.c,v 1.112 2016/03/07 00:16:48 christos Exp $");
 
 #include "opt_ddb.h"
 
@@ -746,11 +746,10 @@ iommu_dvmamap_unload(bus_dma_tag_t t, bus_dmamap_t map)
 	bus_size_t sgsize = map->_dm_dvmasize;
 
 	/* Flush the iommu */
-#ifdef DEBUG
 	if (!map->_dm_dvmastart) {
-		printf("iommu_dvmamap_unload: No dvmastart is zero\n");
+		printf("%s: error dvmastart is zero!\n", __func__);
+		return;
 	}
-#endif
 	iommu_remove(is, map->_dm_dvmastart, map->_dm_dvmasize);
 
 	/* Flush the caches */