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Avoid leaving a configured device without resources.

This commit is contained in:
mlelstv 2024-01-14 07:56:53 +00:00
parent b76ad2e5c8
commit 6ad9868b59
1 changed files with 8 additions and 5 deletions
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13
sys/dev/dm/dm_ioctl.c
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@ -1,4 +1,4 @@
/* $NetBSD: dm_ioctl.c,v 1.56 2022/10/13 06:10:48 andvar Exp $ */
/* $NetBSD: dm_ioctl.c,v 1.57 2024/01/14 07:56:53 mlelstv Exp $ */
/*
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@ -29,7 +29,7 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: dm_ioctl.c,v 1.56 2022/10/13 06:10:48 andvar Exp $");
__KERNEL_RCSID(0, "$NetBSD: dm_ioctl.c,v 1.57 2024/01/14 07:56:53 mlelstv Exp $");
/*
* Locking is used to synchronise between ioctl calls and between dm_table's
@ -209,18 +209,21 @@ dm_dev_create_ioctl(prop_dictionary_t dm_dict)
dm_dev_unbusy(dmv);
return EEXIST;
}
if ((dmv = dm_dev_alloc()) == NULL)
return ENOMEM;
cf = kmem_alloc(sizeof(*cf), KM_SLEEP);
cf->cf_name = dm_cd.cd_name;
cf->cf_atname = dm_ca.ca_name;
cf->cf_unit = atomic_inc_32_nv(&sc_minor_num);
cf->cf_fstate = FSTATE_NOTFOUND;
if ((devt = config_attach_pseudo(cf)) == NULL) {
dm_dev_free(dmv);
kmem_free(cf, sizeof(*cf));
aprint_error("Unable to attach pseudo device dm/%s\n", name);
return (ENOMEM);
}
if ((dmv = dm_dev_alloc()) == NULL)
return ENOMEM;
if (uuid)
strncpy(dmv->uuid, uuid, DM_UUID_LEN);
@ -247,7 +250,7 @@ dm_dev_create_ioctl(prop_dictionary_t dm_dict)
prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor);
disk_init(dmv->diskp, dmv->name, &dmdkdriver);
disk_init(dmv->diskp, device_xname(devt), &dmdkdriver);
disk_attach(dmv->diskp);
dmv->diskp->dk_info = NULL;