Module Name: src
Committed By: jdc
Date: Sat Dec 5 16:48:26 UTC 2009
Modified Files:
src/sys/arch/sparc64/dev: iommu.c
Log Message:
Avoid a panic if we are asked to sync a zero-length map, by returning
immediately.
To generate a diff of this commit:
cvs rdiff -u -r1.88 -r1.89 src/sys/arch/sparc64/dev/iommu.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/sparc64/dev/iommu.c
diff -u src/sys/arch/sparc64/dev/iommu.c:1.88 src/sys/arch/sparc64/dev/iommu.c:1.89
--- src/sys/arch/sparc64/dev/iommu.c:1.88 Sat Nov 7 07:27:46 2009
+++ src/sys/arch/sparc64/dev/iommu.c Sat Dec 5 16:48:26 2009
@@ -1,4 +1,4 @@
-/* $NetBSD: iommu.c,v 1.88 2009/11/07 07:27:46 cegger Exp $ */
+/* $NetBSD: iommu.c,v 1.89 2009/12/05 16:48:26 jdc Exp $ */
/*
* Copyright (c) 1999, 2000 Matthew R. Green
@@ -59,7 +59,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: iommu.c,v 1.88 2009/11/07 07:27:46 cegger Exp $");
+__KERNEL_RCSID(0, "$NetBSD: iommu.c,v 1.89 2009/12/05 16:48:26 jdc Exp $");
#include "opt_ddb.h"
@@ -1000,6 +1000,10 @@
bus_size_t len, int ops)
{
+ /* If len is 0, then there is nothing to do */
+ if (len == 0)
+ return;
+
if (ops & (BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE)) {
/* Flush the CPU then the IOMMU */
bus_dmamap_sync(t->_parent, map, offset, len, ops);
