diff options
Diffstat (limited to 'drivers/target/target_core_transport.c')
| -rw-r--r-- | drivers/target/target_core_transport.c | 48 |
1 files changed, 39 insertions, 9 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 28b6292..236e22d 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -379,6 +379,40 @@ void release_se_global(void) se_global = NULL; } +/* SCSI statistics table index */ +static struct scsi_index_table scsi_index_table; + +/* + * Initialize the index table for allocating unique row indexes to various mib + * tables. + */ +void init_scsi_index_table(void) +{ + memset(&scsi_index_table, 0, sizeof(struct scsi_index_table)); + spin_lock_init(&scsi_index_table.lock); +} + +/* + * Allocate a new row index for the entry type specified + */ +u32 scsi_get_new_index(scsi_index_t type) +{ + u32 new_index; + + if ((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)) { + printk(KERN_ERR "Invalid index type %d\n", type); + return -EINVAL; + } + + spin_lock(&scsi_index_table.lock); + new_index = ++scsi_index_table.scsi_mib_index[type]; + if (new_index == 0) + new_index = ++scsi_index_table.scsi_mib_index[type]; + spin_unlock(&scsi_index_table.lock); + + return new_index; +} + void transport_init_queue_obj(struct se_queue_obj *qobj) { atomic_set(&qobj->queue_cnt, 0); @@ -437,7 +471,6 @@ struct se_session *transport_init_session(void) } INIT_LIST_HEAD(&se_sess->sess_list); INIT_LIST_HEAD(&se_sess->sess_acl_list); - atomic_set(&se_sess->mib_ref_count, 0); return se_sess; } @@ -546,12 +579,6 @@ void transport_deregister_session(struct se_session *se_sess) transport_free_session(se_sess); return; } - /* - * Wait for possible reference in drivers/target/target_core_mib.c: - * scsi_att_intr_port_seq_show() - */ - while (atomic_read(&se_sess->mib_ref_count) != 0) - cpu_relax(); spin_lock_bh(&se_tpg->session_lock); list_del(&se_sess->sess_list); @@ -574,7 +601,6 @@ void transport_deregister_session(struct se_session *se_sess) spin_unlock_bh(&se_tpg->acl_node_lock); core_tpg_wait_for_nacl_pr_ref(se_nacl); - core_tpg_wait_for_mib_ref(se_nacl); core_free_device_list_for_node(se_nacl, se_tpg); TPG_TFO(se_tpg)->tpg_release_fabric_acl(se_tpg, se_nacl); @@ -4827,6 +4853,8 @@ static int transport_do_se_mem_map( return ret; } + + BUG_ON(list_empty(se_mem_list)); /* * This is the normal path for all normal non BIDI and BIDI-COMMAND * WRITE payloads.. If we need to do BIDI READ passthrough for @@ -5008,7 +5036,9 @@ transport_map_control_cmd_to_task(struct se_cmd *cmd) struct se_mem *se_mem = NULL, *se_mem_lout = NULL; u32 se_mem_cnt = 0, task_offset = 0; - BUG_ON(list_empty(cmd->t_task->t_mem_list)); + if (!list_empty(T_TASK(cmd)->t_mem_list)) + se_mem = list_entry(T_TASK(cmd)->t_mem_list->next, + struct se_mem, se_list); ret = transport_do_se_mem_map(dev, task, cmd->t_task->t_mem_list, NULL, se_mem, |