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don't limit size of DMA transfer by size of FIFO 

problem reported and fix provided in PR kern/24200 by Paul Shupak
This commit is contained in:
jdolecek 2004-01-28 20:08:35 +00:00
parent a56d10e9dc
commit 2d2c0ad74d
1 changed files with 3 additions and 6 deletions
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9
sys/dev/ic/atppc.c
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@ -1,4 +1,4 @@
/* $NetBSD: atppc.c,v 1.9 2004/01/28 14:26:24 drochner Exp $ */
/* $NetBSD: atppc.c,v 1.10 2004/01/28 20:08:35 jdolecek Exp $ */
/*
* Copyright (c) 2001 Alcove - Nicolas Souchu
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: atppc.c,v 1.9 2004/01/28 14:26:24 drochner Exp $");
__KERNEL_RCSID(0, "$NetBSD: atppc.c,v 1.10 2004/01/28 20:08:35 jdolecek Exp $");
#include "opt_atppc.h"
@ -2171,11 +2171,8 @@ atppc_fifo_write_dma(struct atppc_softc * const atppc, unsigned char ecr,
atppc_w_ecr(atppc, ecr);
atppc_barrier_w(atppc);
/* Limit transfer to minimum of space in FIFO and buffer */
worklen = min(len, atppc->sc_fifo);
/* Limit transfer to maximum DMA size and start it */
worklen = min(worklen, atppc->sc_dma_maxsize);
worklen = min(len, atppc->sc_dma_maxsize);
atppc->sc_dmastat = ATPPC_DMA_INIT;
atppc->sc_dma_start(atppc, atppc->sc_outbstart,
worklen, ATPPC_DMA_MODE_WRITE);