[PATCH RFC v2 15/18] scsi: libsas: Queue TMF commands as requests

[John Garry <john.garry@huawei.com>]

Like what we did with SMP commands, send TMF commands through the block
layer.

In future we can now also take advantage of the block layer request
timeout handling.

Signed-off-by: John Garry <john.garry@huawei.com>
---
 drivers/scsi/libsas/sas_scsi_host.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index f0566f4512b2..520c301e4319 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -1059,18 +1059,27 @@ int sas_execute_tmf(struct domain_device *device, void *parameter,
 	struct sas_task *task;
 	struct sas_internal *i =
 		to_sas_internal(device->port->ha->core.shost->transportt);
-	struct sas_ha_struct *ha = device->port->ha;
 	int res, retry;
-
+	struct request *rq;
+	struct sas_ha_struct *ha = device->port->ha;
 
 	for (retry = 0; retry < TASK_RETRY; retry++) {
+		struct scsi_cmnd *scmd;
+
 		task = sas_alloc_slow_task(ha, GFP_KERNEL);
-		if (!task)
-			return -ENOMEM;
+		if (!task) {
+			res = -ENOMEM;
+			break;
+		}
 
 		task->dev = device;
 		task->task_proto = device->tproto;
 
+		rq = sas_rq_from_task(task);
+
+		scmd = blk_mq_rq_to_pdu(rq);
+		ASSIGN_SAS_TASK(scmd, task);
+
 		if (dev_is_sata(device)) {
 			task->ata_task.device_control_reg_update = 1;
 			if (force_phy_id >= 0) {
@@ -1082,20 +1091,15 @@ int sas_execute_tmf(struct domain_device *device, void *parameter,
 			memcpy(&task->ssp_task, parameter, para_len);
 		}
 
-		task->task_done = sas_task_internal_done;
+		task->task_done = sas_task_complete_internal;
 		task->tmf = tmf;
 
 		task->slow_task->timer.function = sas_task_internal_timedout;
 		task->slow_task->timer.expires = jiffies + TASK_TIMEOUT;
 		add_timer(&task->slow_task->timer);
 
-		res = i->dft->lldd_execute_task(task, GFP_KERNEL);
-		if (res) {
-			del_timer_sync(&task->slow_task->timer);
-			pr_err("executing TMF task failed %016llx (%d)\n",
-			       SAS_ADDR(device->sas_addr), res);
-			break;
-		}
+		rq->end_io = sas_blk_end_sync_rq;
+		blk_execute_rq_nowait(rq, true);
 
 		wait_for_completion(&task->slow_task->completion);
 
-- 
2.26.2