Merge SCSI misc branch into isci-for-3.6 tag

drivers/scsi/isci/host.c

@@ -1044,7 +1044,7 @@ static enum sci_status sci_controller_start(struct isci_host *ihost,
 	return SCI_SUCCESS;
 }
 
-void isci_host_scan_start(struct Scsi_Host *shost)
+void isci_host_start(struct Scsi_Host *shost)
 {
 	struct isci_host *ihost = SHOST_TO_SAS_HA(shost)->lldd_ha;
 	unsigned long tmo = sci_controller_get_suggested_start_timeout(ihost);
@@ -1079,7 +1079,6 @@ static void sci_controller_completion_handler(struct isci_host *ihost)
 
 void ireq_done(struct isci_host *ihost, struct isci_request *ireq, struct sas_task *task)
 {
-	task->lldd_task = NULL;
 	if (!test_bit(IREQ_ABORT_PATH_ACTIVE, &ireq->flags) &&
 	    !(task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
 		if (test_bit(IREQ_COMPLETE_IN_TARGET, &ireq->flags)) {
@@ -1087,16 +1086,19 @@ void ireq_done(struct isci_host *ihost, struct isci_request *ireq, struct sas_ta
 			dev_dbg(&ihost->pdev->dev,
 				"%s: Normal - ireq/task = %p/%p\n",
 				__func__, ireq, task);
-
+			task->lldd_task = NULL;
 			task->task_done(task);
 		} else {
 			dev_dbg(&ihost->pdev->dev,
 				"%s: Error - ireq/task = %p/%p\n",
 				__func__, ireq, task);
-
+			if (sas_protocol_ata(task->task_proto))
+				task->lldd_task = NULL;
 			sas_task_abort(task);
 		}
-	}
+	} else
+		task->lldd_task = NULL;
+
 	if (test_and_clear_bit(IREQ_ABORT_PATH_ACTIVE, &ireq->flags))
 		wake_up_all(&ihost->eventq);
 
@@ -1120,10 +1122,16 @@ void isci_host_completion_routine(unsigned long data)
 	sci_controller_completion_handler(ihost);
 	spin_unlock_irq(&ihost->scic_lock);
 
-	/* the coalesence timeout doubles at each encoding step, so
+	/*
+	 * we subtract SCI_MAX_PORTS to account for the number of dummy TCs
+	 * issued for hardware issue workaround
+	 */
+	active = isci_tci_active(ihost) - SCI_MAX_PORTS;
+
+	/*
+	 * the coalesence timeout doubles at each encoding step, so
 	 * update it based on the ilog2 value of the outstanding requests
 	 */
-	active = isci_tci_active(ihost);
 	writel(SMU_ICC_GEN_VAL(NUMBER, active) |
 	       SMU_ICC_GEN_VAL(TIMER, ISCI_COALESCE_BASE + ilog2(active)),
 	       &ihost->smu_registers->interrupt_coalesce_control);