target: Fix incorrect transport_sent usage

This patch converts target-core to use se_cmd->t_transport_sent instead of
a duplicated se_cmd->transport_sent member in a handful of locations.
It also updates iscsi_target to properly use ->t_transport_sent instead of
it's own iscsi_cmd_t->transport_sent value that was not being assigned.

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

drivers/target/iscsi/iscsi_target_core.h

@@ -428,7 +428,6 @@ struct iscsi_cmd {
 	/* Number of times struct iscsi_cmd is present in immediate queue */
 	atomic_t		immed_queue_count;
 	atomic_t		response_queue_count;
-	atomic_t		transport_sent;
 	spinlock_t		datain_lock;
 	spinlock_t		dataout_timeout_lock;
 	/* spinlock for protecting struct iscsi_cmd->i_state */

drivers/target/iscsi/iscsi_target_tmr.c

@@ -250,7 +250,7 @@ static int iscsit_task_reassign_complete_write(
 	 * so if we have received all DataOUT we can safety ignore Initiator.
 	 */
 	if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) {
-		if (!atomic_read(&cmd->transport_sent)) {
+		if (!atomic_read(&cmd->se_cmd.t_transport_sent)) {
 			pr_debug("WRITE ITT: 0x%08x: t_state: %d"
 				" never sent to transport\n",
 				cmd->init_task_tag, cmd->se_cmd.t_state);
@@ -314,7 +314,7 @@ static int iscsit_task_reassign_complete_read(
 		cmd->acked_data_sn = (tmr_req->exp_data_sn - 1);
 	}
 
-	if (!atomic_read(&cmd->transport_sent)) {
+	if (!atomic_read(&cmd->se_cmd.t_transport_sent)) {
 		pr_debug("READ ITT: 0x%08x: t_state: %d never sent to"
 			" transport\n", cmd->init_task_tag,
 			cmd->se_cmd.t_state);

drivers/target/target_core_transport.c

@@ -2294,7 +2294,7 @@ check_depth:
 
 	if (atomic_read(&cmd->t_task_cdbs_sent) ==
 	    cmd->t_task_list_num)
-		atomic_set(&cmd->transport_sent, 1);
+		atomic_set(&cmd->t_transport_sent, 1);
 
 	transport_start_task_timer(task);
 	spin_unlock_irqrestore(&cmd->t_state_lock, flags);
@@ -2311,7 +2311,7 @@ check_depth:
 			task->task_flags &= ~TF_ACTIVE;
 			spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 			del_timer_sync(&task->task_timer);
-			atomic_set(&cmd->transport_sent, 0);
+			atomic_set(&cmd->t_transport_sent, 0);
 			transport_stop_tasks_for_cmd(cmd);
 			atomic_inc(&dev->depth_left);
 			transport_generic_request_failure(cmd, 0, 1);
@@ -2351,7 +2351,7 @@ check_depth:
 			task->task_flags &= ~TF_ACTIVE;
 			spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 			del_timer_sync(&task->task_timer);
-			atomic_set(&cmd->transport_sent, 0);
+			atomic_set(&cmd->t_transport_sent, 0);
 			transport_stop_tasks_for_cmd(cmd);
 			atomic_inc(&dev->depth_left);
 			transport_generic_request_failure(cmd, 0, 1);

include/target/target_core_base.h

@@ -439,7 +439,6 @@ struct se_cmd {
 	u32			orig_fe_lun;
 	/* Persistent Reservation key */
 	u64			pr_res_key;
-	atomic_t                transport_sent;
 	/* Used for sense data */
 	void			*sense_buffer;
 	struct list_head	se_delayed_node;