- num_sg = pci_map_sg(asd_ha->pcidev, task->scatter, task->num_scatter,
- task->data_dir);
+ /* STP tasks come from libata which has already mapped
+ * the SG list */
+ if (task->task_proto == SAS_PROTOCOL_STP)
+ num_sg = task->num_scatter;
+ else
+ num_sg = pci_map_sg(asd_ha->pcidev, task->scatter,
+ task->num_scatter, task->data_dir);