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In _bus_dmamap_load_buffer(), honour the maximum segment size specified 

when the DMA map was created.

The previous behaviour honoured the maximum segment size only when
coalescing adjacent segments.
This commit is contained in:
scw 2004-08-17 08:35:43 +00:00
parent 682ddb0274
commit ad271535d4
1 changed files with 3 additions and 2 deletions
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5
sys/arch/powerpc/powerpc/bus_dma.c
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@ -1,4 +1,4 @@
/* $NetBSD: bus_dma.c,v 1.18 2004/08/16 10:12:40 aymeric Exp $ */
/* $NetBSD: bus_dma.c,v 1.19 2004/08/17 08:35:43 scw 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 1.18 2004/08/16 10:12:40 aymeric Exp $");
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.19 2004/08/17 08:35:43 scw Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -195,6 +195,7 @@ _bus_dmamap_load_buffer(t, map, buf, buflen, p, flags, lastaddrp, segp, first)
sgsize = PAGE_SIZE - ((u_long)vaddr & PGOFSET);
if (buflen < sgsize)
sgsize = buflen;
sgsize = min(sgsize, map->_dm_maxsegsz);
/*
* Make sure we don't cross any boundaries.