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If there are readers or writers in the alldevs list, don't remove a 

device_t out from under them, but tag it for deletion, later.
This commit is contained in:
dyoung 2011-01-31 23:00:34 +00:00
parent bcb5ce2065
commit 25fc6f07bf
1 changed files with 10 additions and 4 deletions
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14
sys/kern/subr_autoconf.c
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@ -1,4 +1,4 @@
/* $NetBSD: subr_autoconf.c,v 1.210 2011/01/14 10:18:21 martin Exp $ */ /* $NetBSD: subr_autoconf.c,v 1.211 2011/01/31 23:00:34 dyoung Exp $ */
/* /*
* Copyright (c) 1996, 2000 Christopher G. Demetriou * Copyright (c) 1996, 2000 Christopher G. Demetriou
@ -77,7 +77,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.210 2011/01/14 10:18:21 martin Exp $"); __KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.211 2011/01/31 23:00:34 dyoung Exp $");
#ifdef _KERNEL_OPT #ifdef _KERNEL_OPT
#include "opt_ddb.h" #include "opt_ddb.h"
@ -1700,8 +1700,14 @@ out:
config_alldevs_enter(&af); config_alldevs_enter(&af);
KASSERT(alldevs_nwrite != 0); KASSERT(alldevs_nwrite != 0);
--alldevs_nwrite; --alldevs_nwrite;
if (rv == 0 && dev->dv_del_gen == 0) if (rv == 0 && dev->dv_del_gen == 0) {
config_devunlink(dev, &af.af_garbage); if (alldevs_nwrite == 0 && alldevs_nread == 0)
config_devunlink(dev, &af.af_garbage);
else {
dev->dv_del_gen = alldevs_gen;
alldevs_garbage = true;
}
}
config_alldevs_exit(&af); config_alldevs_exit(&af);
return rv; return rv;