scsi: qla2xxx: Move session delete to driver work queue

Move session delete from system work queue to driver's work queue for in
time processing.

Fixes: 726b8548 ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_os.c

@@ -3193,10 +3193,11 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	    host->can_queue, base_vha->req,
 	    base_vha->mgmt_svr_loop_id, host->sg_tablesize);
 
+	ha->wq = alloc_workqueue("qla2xxx_wq", WQ_MEM_RECLAIM, 0);
+
 	if (ha->mqenable) {
 		bool mq = false;
 		bool startit = false;
-		ha->wq = alloc_workqueue("qla2xxx_wq", WQ_MEM_RECLAIM, 0);
 
 		if (QLA_TGT_MODE_ENABLED()) {
 			mq = true;

drivers/scsi/qla2xxx/qla_target.c

@@ -1205,7 +1205,8 @@ void qlt_schedule_sess_for_deletion(struct fc_port *sess,
 	ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 	    "Scheduling sess %p for deletion\n", sess);
 
-	schedule_work(&sess->del_work);
+	INIT_WORK(&sess->del_work, qla24xx_delete_sess_fn);
+	queue_work(sess->vha->hw->wq, &sess->del_work);
 }
 
 void qlt_schedule_sess_for_deletion_lock(struct fc_port *sess)