target: remove sess_kref and ->shutdown_session

Both of them are unused now that drivers handle any delayed session
shutdown internally.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

2 files changed, 3 insertions, 34 deletions

diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index a81a370..d99752c 100644
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -340,26 +340,18 @@ static void target_shutdown_sessions(struct se_node_acl *acl)
 {
 	struct se_session *sess;
 	unsigned long flags;
-	int ret;
 
 restart:
 	spin_lock_irqsave(&acl->nacl_sess_lock, flags);
 	list_for_each_entry(sess, &acl->acl_sess_list, sess_acl_list) {
 		if (sess->sess_tearing_down)
 			continue;
-		if (!target_get_session(sess))
-			continue;
 
 		list_del_init(&sess->sess_acl_list);
-
 		spin_unlock_irqrestore(&acl->nacl_sess_lock, flags);
-		if (acl->se_tpg->se_tpg_tfo->shutdown_session)
-			ret = acl->se_tpg->se_tpg_tfo->shutdown_session(sess);
-		else
-			ret = 1;
-		target_put_session(sess);
-		if (ret)
-			target_put_session(sess);
+
+		if (acl->se_tpg->se_tpg_tfo->close_session)
+			acl->se_tpg->se_tpg_tfo->close_session(sess);
 		goto restart;
 	}
 	spin_unlock_irqrestore(&acl->nacl_sess_lock, flags);
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 2914d4c..6c089af 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -239,7 +239,6 @@ struct se_session *transport_init_session(enum target_prot_op sup_prot_ops)
 	INIT_LIST_HEAD(&se_sess->sess_cmd_list);
 	INIT_LIST_HEAD(&se_sess->sess_wait_list);
 	spin_lock_init(&se_sess->sess_cmd_lock);
-	kref_init(&se_sess->sess_kref);
 	se_sess->sup_prot_ops = sup_prot_ops;
 
 	return se_sess;
@@ -430,28 +429,6 @@ target_alloc_session(struct se_portal_group *tpg,
 }
 EXPORT_SYMBOL(target_alloc_session);
 
-static void target_release_session(struct kref *kref)
-{
-	struct se_session *se_sess = container_of(kref,
-			struct se_session, sess_kref);
-	struct se_portal_group *se_tpg = se_sess->se_tpg;
-
-	if (se_tpg->se_tpg_tfo->close_session)
-		se_tpg->se_tpg_tfo->close_session(se_sess);
-}
-
-int target_get_session(struct se_session *se_sess)
-{
-	return kref_get_unless_zero(&se_sess->sess_kref);
-}
-EXPORT_SYMBOL(target_get_session);
-
-void target_put_session(struct se_session *se_sess)
-{
-	kref_put(&se_sess->sess_kref, target_release_session);
-}
-EXPORT_SYMBOL(target_put_session);
-
 ssize_t target_show_dynamic_sessions(struct se_portal_group *se_tpg, char *page)
 {
 	struct se_session *se_sess;