arm64: dts: rockchip: add tsadc's working clock rate for rk3288

[firefly-linux-kernel-4.4.55.git] / drivers / target / target_core_tpg.c

diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index 5fb9dd7f08bb030d6970f05a5600af41b37257a6..2794c6ec5c3c5e43daf4783189ea9a87b15a8604 100644 (file)
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -75,9 +75,21 @@ struct se_node_acl *core_tpg_get_initiator_node_acl(
        unsigned char *initiatorname)
 {
        struct se_node_acl *acl;
-
+       /*
+        * Obtain se_node_acl->acl_kref using fabric driver provided
+        * initiatorname[] during node acl endpoint lookup driven by
+        * new se_session login.
+        *
+        * The reference is held until se_session shutdown -> release
+        * occurs via fabric driver invoked transport_deregister_session()
+        * or transport_free_session() code.
+        */
        mutex_lock(&tpg->acl_node_mutex);
        acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
+       if (acl) {
+               if (!kref_get_unless_zero(&acl->acl_kref))
+                       acl = NULL;
+       }
        mutex_unlock(&tpg->acl_node_mutex);
 
        return acl;
@@ -232,6 +244,25 @@ static void target_add_node_acl(struct se_node_acl *acl)
                acl->initiatorname);
 }
 
+bool target_tpg_has_node_acl(struct se_portal_group *tpg,
+                            const char *initiatorname)
+{
+       struct se_node_acl *acl;
+       bool found = false;
+
+       mutex_lock(&tpg->acl_node_mutex);
+       list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
+               if (!strcmp(acl->initiatorname, initiatorname)) {
+                       found = true;
+                       break;
+               }
+       }
+       mutex_unlock(&tpg->acl_node_mutex);
+
+       return found;
+}
+EXPORT_SYMBOL(target_tpg_has_node_acl);
+
 struct se_node_acl *core_tpg_check_initiator_node_acl(
        struct se_portal_group *tpg,
        unsigned char *initiatorname)
@@ -248,6 +279,15 @@ struct se_node_acl *core_tpg_check_initiator_node_acl(
        acl = target_alloc_node_acl(tpg, initiatorname);
        if (!acl)
                return NULL;
+       /*
+        * When allocating a dynamically generated node_acl, go ahead
+        * and take the extra kref now before returning to the fabric
+        * driver caller.
+        *
+        * Note this reference will be released at session shutdown
+        * time within transport_free_session() code.
+        */
+       kref_get(&acl->acl_kref);
        acl->dynamic_node_acl = 1;
 
        /*
@@ -499,7 +539,7 @@ static void core_tpg_lun_ref_release(struct percpu_ref *ref)
 {
        struct se_lun *lun = container_of(ref, struct se_lun, lun_ref);
 
-       complete(&lun->lun_ref_comp);
+       complete(&lun->lun_shutdown_comp);
 }
 
 int core_tpg_register(
@@ -626,6 +666,7 @@ struct se_lun *core_tpg_alloc_lun(
        lun->lun_link_magic = SE_LUN_LINK_MAGIC;
        atomic_set(&lun->lun_acl_count, 0);
        init_completion(&lun->lun_ref_comp);
+       init_completion(&lun->lun_shutdown_comp);
        INIT_LIST_HEAD(&lun->lun_deve_list);
        INIT_LIST_HEAD(&lun->lun_dev_link);
        atomic_set(&lun->lun_tg_pt_secondary_offline, 0);