target: remove TRANSPORT_DEFERRED_CMD state

We never check for this state, and it makes testing for a completed
state much harder given that it overrides the existing state.

Also remove the unused deferred_t_state which is related to it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/target_core_tmr.c

@@ -237,12 +237,12 @@ static void core_tmr_drain_task_list(
 		cmd = task->task_se_cmd;
 
 		pr_debug("LUN_RESET: %s cmd: %p task: %p"
-			" ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state/"
-			"def_t_state: %d/%d cdb: 0x%02x\n",
+			" ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state: %d"
+			"cdb: 0x%02x\n",
 			(preempt_and_abort_list) ? "Preempt" : "", cmd, task,
 			cmd->se_tfo->get_task_tag(cmd), 0,
 			cmd->se_tfo->get_cmd_state(cmd), cmd->t_state,
-			cmd->deferred_t_state, cmd->t_task_cdb[0]);
+			cmd->t_task_cdb[0]);
 		pr_debug("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx"
 			" t_task_cdbs: %d t_task_cdbs_left: %d"
 			" t_task_cdbs_sent: %d -- t_transport_active: %d"

drivers/target/target_core_transport.c

@@ -478,8 +478,6 @@ static int transport_cmd_check_stop(
 			" == TRUE for ITT: 0x%08x\n", __func__, __LINE__,
 			cmd->se_tfo->get_task_tag(cmd));
 
-		cmd->deferred_t_state = cmd->t_state;
-		cmd->t_state = TRANSPORT_DEFERRED_CMD;
 		atomic_set(&cmd->t_transport_active, 0);
 		if (transport_off == 2)
 			transport_all_task_dev_remove_state(cmd);
@@ -497,8 +495,6 @@ static int transport_cmd_check_stop(
 			" TRUE for ITT: 0x%08x\n", __func__, __LINE__,
 			cmd->se_tfo->get_task_tag(cmd));
 
-		cmd->deferred_t_state = cmd->t_state;
-		cmd->t_state = TRANSPORT_DEFERRED_CMD;
 		if (transport_off == 2)
 			transport_all_task_dev_remove_state(cmd);
 
@@ -1845,10 +1841,9 @@ static void transport_generic_request_failure(
 	pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x"
 		" CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd),
 		cmd->t_task_cdb[0]);
-	pr_debug("-----[ i_state: %d t_state/def_t_state:"
-		" %d/%d transport_error_status: %d\n",
+	pr_debug("-----[ i_state: %d t_state: %d transport_error_status: %d\n",
 		cmd->se_tfo->get_cmd_state(cmd),
-		cmd->t_state, cmd->deferred_t_state,
+		cmd->t_state,
 		cmd->transport_error_status);
 	pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d"
 		" t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --"
@@ -4404,10 +4399,9 @@ void transport_wait_for_tasks(struct se_cmd *cmd)
 	atomic_set(&cmd->t_transport_stop, 1);
 
 	pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x"
-		" i_state: %d, t_state/def_t_state: %d/%d, t_transport_stop"
-		" = TRUE\n", cmd, cmd->se_tfo->get_task_tag(cmd),
-		cmd->se_tfo->get_cmd_state(cmd), cmd->t_state,
-		cmd->deferred_t_state);
+		" i_state: %d, t_state: %d, t_transport_stop = TRUE\n",
+		cmd, cmd->se_tfo->get_task_tag(cmd),
+		cmd->se_tfo->get_cmd_state(cmd), cmd->t_state);
 
 	spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
@@ -4806,9 +4800,9 @@ static int transport_processing_thread(void *param)
 			transport_complete_qf(cmd);
 			break;
 		default:
-			pr_err("Unknown t_state: %d deferred_t_state:"
-				" %d for ITT: 0x%08x i_state: %d on SE LUN:"
-				" %u\n", cmd->t_state, cmd->deferred_t_state,
+			pr_err("Unknown t_state: %d  for ITT: 0x%08x "
+				"i_state: %d on SE LUN: %u\n",
+				cmd->t_state,
 				cmd->se_tfo->get_task_tag(cmd),
 				cmd->se_tfo->get_cmd_state(cmd),
 				cmd->se_lun->unpacked_lun);

include/target/target_core_base.h

@@ -83,7 +83,6 @@ enum se_task_flags {
 enum transport_state_table {
 	TRANSPORT_NO_STATE	= 0,
 	TRANSPORT_NEW_CMD	= 1,
-	TRANSPORT_DEFERRED_CMD	= 2,
 	TRANSPORT_WRITE_PENDING	= 3,
 	TRANSPORT_PROCESS_WRITE	= 4,
 	TRANSPORT_PROCESSING	= 5,
@@ -434,8 +433,6 @@ struct se_cmd {
 	int			sam_task_attr;
 	/* Transport protocol dependent state, see transport_state_table */
 	enum transport_state_table t_state;
-	/* Transport protocol dependent state for out of order CmdSNs */
-	int			deferred_t_state;
 	/* Transport specific error status */
 	int			transport_error_status;
 	/* See se_cmd_flags_table */