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When computing the segment size, consider the maximum segment 

size in the DMA map.
This commit is contained in:
thorpej 2000-07-17 04:47:56 +00:00
parent 8746b7c870
commit 5edc9ef4a4
1 changed files with 4 additions and 2 deletions
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6
sys/arch/alpha/common/bus_dma.c
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@ -1,4 +1,4 @@
/* $NetBSD: bus_dma.c,v 1.39 2000/06/29 09:02:56 mrg Exp $ */
/* $NetBSD: bus_dma.c,v 1.40 2000/07/17 04:47:56 thorpej Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
@ -39,7 +39,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.39 2000/06/29 09:02:56 mrg Exp $");
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.40 2000/07/17 04:47:56 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -179,6 +179,8 @@ _bus_dmamap_load_buffer_direct_common(t, map, buf, buflen, p, flags,
sgsize = NBPG - ((u_long)vaddr & PGOFSET);
if (buflen < sgsize)
sgsize = buflen;
if (map->_dm_maxsegsz < sgsize)
sgsize = map->_dm_maxsegsz;
/*
* Make sure we don't cross any boundaries.