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tcm_qla2xxx: Convert to TFO->put_session() usage

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This patch converts tcm_qla2xxx code to use an internal kref_put() for
se_session->sess_kref in order to ensure that qla_hw_data->hardware_lock
can be held while calling qlt_unreg_sess() for the final put.

Signed-off-by: Joern Engel <joern@logfs.org>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Arun Easi <arun.easi@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Joern Engel 2012-05-18 13:58:23 -07:00 committed by Nicholas Bellinger
parent 4149268e78
commit aaf68b7533
1 changed files with 22 additions and 1 deletions
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23
drivers/scsi/qla2xxx/tcm_qla2xxx.c
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@ -844,9 +844,28 @@ static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
se_nacl, nacl->nport_wwnn, nacl->nport_id);
}
static void tcm_qla2xxx_release_session(struct kref *kref)
{
struct se_session *se_sess = container_of(kref,
struct se_session, sess_kref);
qlt_unreg_sess(se_sess->fabric_sess_ptr);
}
static void tcm_qla2xxx_put_session(struct se_session *se_sess)
{
struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
struct qla_hw_data *ha = sess->vha->hw;
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
kref_put(&se_sess->sess_kref, tcm_qla2xxx_release_session);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
{
target_put_session(sess->se_sess);
tcm_qla2xxx_put_session(sess->se_sess);
}
static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
@ -1731,6 +1750,7 @@ static struct target_core_fabric_ops tcm_qla2xxx_ops = {
.new_cmd_map = NULL,
.check_stop_free = tcm_qla2xxx_check_stop_free,
.release_cmd = tcm_qla2xxx_release_cmd,
.put_session = tcm_qla2xxx_put_session,
.shutdown_session = tcm_qla2xxx_shutdown_session,
.close_session = tcm_qla2xxx_close_session,
.sess_get_index = tcm_qla2xxx_sess_get_index,
@ -1779,6 +1799,7 @@ static struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
.tpg_release_fabric_acl = tcm_qla2xxx_release_fabric_acl,
.tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
.release_cmd = tcm_qla2xxx_release_cmd,
.put_session = tcm_qla2xxx_put_session,
.shutdown_session = tcm_qla2xxx_shutdown_session,
.close_session = tcm_qla2xxx_close_session,
.sess_get_index = tcm_qla2xxx_sess_get_index,