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initialise "paddr_t lastaddr" to 0 in the cases it is not otherwise 

set.  previously, if the stack garbage happened to match the
"curaddr" in _bus_dmamap_load_buffer(), the wrong thing may have
happened.
This commit is contained in:
mrg 2008-01-29 23:46:21 +00:00
parent ce82b598ec
commit 9e023272db
1 changed files with 5 additions and 5 deletions
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10
sys/arch/powerpc/powerpc/bus_dma.c
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@ -1,4 +1,4 @@
/* $NetBSD: bus_dma.c,v 1.30 2007/03/04 06:00:37 christos Exp $ */
/* $NetBSD: bus_dma.c,v 1.31 2008/01/29 23:46:21 mrg Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@ -38,7 +38,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.30 2007/03/04 06:00:37 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.31 2008/01/29 23:46:21 mrg Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -262,7 +262,7 @@ _bus_dmamap_load(t, map, buf, buflen, p, flags)
struct proc *p;
int flags;
{
paddr_t lastaddr;
paddr_t lastaddr = 0;
int seg, error;
struct vmspace *vm;
@ -302,7 +302,7 @@ _bus_dmamap_load_mbuf(t, map, m0, flags)
struct mbuf *m0;
int flags;
{
paddr_t lastaddr;
paddr_t lastaddr = 0;
int seg, error, first;
struct mbuf *m;
@ -376,7 +376,7 @@ _bus_dmamap_load_uio(t, map, uio, flags)
struct uio *uio;
int flags;
{
paddr_t lastaddr;
paddr_t lastaddr = 0;
int seg, i, error, first;
bus_size_t minlen, resid;
struct iovec *iov;