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tcm_fc: Do not free tpg structure during wq allocation failure 

Avoid freeing a registered tpg structure if an alloc_workqueue call
fails.  This fixes a bug where the failure was leaking memory associated
with se_portal_group setup during the original core_tpg_register() call.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Acked-by: Kiran Patil <Kiran.patil@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Mark Rustad 2012-04-03 10:24:52 -07:00 committed by Nicholas Bellinger
parent e1c4038282
commit 06383f10c4
1 changed files with 8 additions and 5 deletions
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13
drivers/target/tcm_fc/tfc_conf.c
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@ -300,6 +300,7 @@ static struct se_portal_group *ft_add_tpg(
{
struct ft_lport_acl *lacl;
struct ft_tpg *tpg;
struct workqueue_struct *wq;
unsigned long index;
int ret;
@ -321,18 +322,20 @@ static struct se_portal_group *ft_add_tpg(
tpg->lport_acl = lacl;
INIT_LIST_HEAD(&tpg->lun_list);
ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg,
tpg, TRANSPORT_TPG_TYPE_NORMAL);
if (ret < 0) {
wq = alloc_workqueue("tcm_fc", 0, 1);
if (!wq) {
kfree(tpg);
return NULL;
}
tpg->workqueue = alloc_workqueue("tcm_fc", 0, 1);
if (!tpg->workqueue) {
ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg,
tpg, TRANSPORT_TPG_TYPE_NORMAL);
if (ret < 0) {
destroy_workqueue(wq);
kfree(tpg);
return NULL;
}
tpg->workqueue = wq;
mutex_lock(&ft_lport_lock);
list_add_tail(&tpg->list, &lacl->tpg_list);