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In the match routine, check to see if we can access the SCSI controller's

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registers without generating a bus error. This can happen on some board
variants which have no SCSI controller.
This commit is contained in:
scw 2003-11-26 14:29:37 +00:00
parent e6085b4b12
commit 91c88f7f6b
1 changed files with 14 additions and 2 deletions
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16
sys/dev/mvme/osiop_pcctwo.c
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@ -1,4 +1,4 @@
/* $NetBSD: osiop_pcctwo.c,v 1.5 2003/07/14 15:47:20 lukem Exp $ */
/* $NetBSD: osiop_pcctwo.c,v 1.6 2003/11/26 14:29:37 scw Exp $ */
/*-
* Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
@ -42,7 +42,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: osiop_pcctwo.c,v 1.5 2003/07/14 15:47:20 lukem Exp $");
__KERNEL_RCSID(0, "$NetBSD: osiop_pcctwo.c,v 1.6 2003/11/26 14:29:37 scw Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -87,12 +87,24 @@ osiop_pcctwo_match(parent, cf, args)
void *args;
{
struct pcctwo_attach_args *pa;
bus_space_handle_t bsh;
int rv;
pa = args;
if (strcmp(pa->pa_name, osiop_cd.cd_name))
return (0);
/*
* See if the SCSI controller is responding.
*/
if (bus_space_map(pa->pa_bust, pa->pa_offset, OSIOP_NREGS, 0, &bsh))
return (0);
rv = bus_space_peek_1(pa->pa_bust, bsh, OSIOP_CTEST8, NULL);
bus_space_unmap(pa->pa_bust, bsh, OSIOP_NREGS);
if (rv)
return (0);
pa->pa_ipl = cf->pcctwocf_ipl;
return (1);