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Stop the kernel from panicking when it detaches sysbeep0: do not 

try to free the device driver-private storage if dv_private is
NULL.
This commit is contained in:
dyoung 2008-03-07 06:29:20 +00:00
parent b0f548e27b
commit 954c0a60d9
1 changed files with 3 additions and 3 deletions
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6
sys/kern/subr_autoconf.c
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@ -1,4 +1,4 @@
/* $NetBSD: subr_autoconf.c,v 1.137 2008/03/05 15:37:55 dyoung Exp $ */
/* $NetBSD: subr_autoconf.c,v 1.138 2008/03/07 06:29:20 dyoung Exp $ */
/*
* Copyright (c) 1996, 2000 Christopher G. Demetriou
@ -77,7 +77,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.137 2008/03/05 15:37:55 dyoung Exp $");
__KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.138 2008/03/07 06:29:20 dyoung Exp $");
#include "opt_multiprocessor.h"
#include "opt_ddb.h"
@ -1218,7 +1218,7 @@ config_devdealloc(device_t dev)
if (dev->dv_locators)
free(dev->dv_locators, M_DEVBUF);
if ((dev->dv_flags & DVF_PRIV_ALLOC) != 0)
if ((dev->dv_flags & DVF_PRIV_ALLOC) != 0 && dev->dv_private != NULL)
free(dev->dv_private, M_DEVBUF);
free(dev, M_DEVBUF);