3 files changed, 73 insertions, 9 deletions

diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index b425ed523ccc..b0afa4486158 100644
--- a/drivers/scsi/isci/host.c
+++ b/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);
diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h
index 9ab58e0540e7..4911310a38f5 100644
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -473,7 +473,7 @@ void sci_controller_remote_device_stopped(struct isci_host *ihost,
 
 enum sci_status sci_controller_continue_io(struct isci_request *ireq);
 int isci_host_scan_finished(struct Scsi_Host *, unsigned long);
-void isci_host_scan_start(struct Scsi_Host *);
+void isci_host_start(struct Scsi_Host *);
 u16 isci_alloc_tag(struct isci_host *ihost);
 enum sci_status isci_free_tag(struct isci_host *ihost, u16 io_tag);
 void isci_tci_free(struct isci_host *ihost, u16 tci);
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c
index 1286a8a787e2..5ed4e608f200 100644
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -156,7 +156,7 @@ static struct scsi_host_template isci_sht = {
 	.target_alloc			= sas_target_alloc,
 	.slave_configure		= sas_slave_configure,
 	.scan_finished			= isci_host_scan_finished,
-	.scan_start			= isci_host_scan_start,
+	.scan_start			= isci_host_start,
 	.change_queue_depth		= sas_change_queue_depth,
 	.change_queue_type		= sas_change_queue_type,
 	.bios_param			= sas_bios_param,
@@ -721,11 +721,67 @@ static void __devexit isci_pci_remove(struct pci_dev *pdev)
 	}
 }
 
+#ifdef CONFIG_PM
+static int isci_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct isci_host *ihost;
+	int i;
+
+	for_each_isci_host(i, ihost, pdev) {
+		sas_suspend_ha(&ihost->sas_ha);
+		isci_host_deinit(ihost);
+	}
+
+	pci_save_state(pdev);
+	pci_disable_device(pdev);
+	pci_set_power_state(pdev, PCI_D3hot);
+
+	return 0;
+}
+
+static int isci_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct isci_host *ihost;
+	int rc, i;
+
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+
+	rc = pcim_enable_device(pdev);
+	if (rc) {
+		dev_err(&pdev->dev,
+			"enabling device failure after resume(%d)\n", rc);
+		return rc;
+	}
+
+	pci_set_master(pdev);
+
+	for_each_isci_host(i, ihost, pdev) {
+		sas_prep_resume_ha(&ihost->sas_ha);
+
+		isci_host_init(ihost);
+		isci_host_start(ihost->sas_ha.core.shost);
+		wait_for_start(ihost);
+
+		sas_resume_ha(&ihost->sas_ha);
+	}
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume);
+#endif
+
 static struct pci_driver isci_pci_driver = {
 	.name		= DRV_NAME,
 	.id_table	= isci_id_table,
 	.probe		= isci_pci_probe,
 	.remove		= __devexit_p(isci_pci_remove),
+#ifdef CONFIG_PM
+	.driver.pm      = &isci_pm_ops,
+#endif
 };
 
 static __init int isci_init(void)