scsi: hisi_sas: add status and command buffer for internal abort

For v3 hw, internal abort function required status and command buffer to
be set, so add necessary code for this.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hisi_sas/hisi_sas_main.c

@@ -1363,12 +1363,21 @@ hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
 	slot->port = port;
 	task->lldd_task = slot;
 
+	slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
+			GFP_ATOMIC, &slot->buf_dma);
+	if (!slot->buf) {
+		rc = -ENOMEM;
+		goto err_out_tag;
+	}
+
 	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
+	memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
+	memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
 
 	rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
 				      abort_flag, task_tag);
 	if (rc)
-		goto err_out_tag;
+		goto err_out_buf;
 
 
 	list_add_tail(&slot->entry, &sas_dev->list);
@@ -1386,6 +1395,9 @@ hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
 
 	return 0;
 
+err_out_buf:
+	dma_pool_free(hisi_hba->buffer_pool, slot->buf,
+		slot->buf_dma);
 err_out_tag:
 	spin_lock_irqsave(&hisi_hba->lock, flags);
 	hisi_sas_slot_index_free(hisi_hba, slot_idx);