scsi: target: qla2xxx: Convert to new submission API

target_submit_cmd() is now only for simple drivers that do their
own sync during shutdown and do not use target_stop_session().

tcm_qla2xxx uses target_stop_session() to sync session shutdown with LIO
core, so we use target_init_cmd()/target_submit_prep()/target_submit(),
because target_init_cmd() will detect the target_stop_session() call and
return an error.

Link: https://lore.kernel.org/r/20210227170006.5077-8-michael.christie@oracle.com
Cc: Nilesh Javali <njavali@marvell.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/tcm_qla2xxx.c

@@ -451,7 +451,7 @@ static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 	struct se_portal_group *se_tpg;
 	struct tcm_qla2xxx_tpg *tpg;
 #endif
-	int target_flags = TARGET_SCF_ACK_KREF;
+	int rc, target_flags = TARGET_SCF_ACK_KREF;
 	unsigned long flags;
 
 	if (bidi)
@@ -486,9 +486,17 @@ static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 	list_add_tail(&cmd->sess_cmd_list, &sess->sess_cmd_list);
 	spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
 
-	return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
-				 cmd->unpacked_lun, data_length, fcp_task_attr,
-				 data_dir, target_flags);
+	rc = target_init_cmd(se_cmd, se_sess, &cmd->sense_buffer[0],
+			     cmd->unpacked_lun, data_length, fcp_task_attr,
+			     data_dir, target_flags);
+	if (rc)
+		return rc;
+
+	if (target_submit_prep(se_cmd, cdb, NULL, 0, NULL, 0, NULL, 0))
+		return 0;
+
+	target_submit(se_cmd);
+	return 0;
 }
 
 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)