isci: enable interrupts during controller start, and flush discovery

Polling the event queue during scan is an unneeded holdover from the
original driver.

Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
[djbw: ensure we flush all port events and domain discovery]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index dbdc3ba..7f351a3 100644 (file)
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -113,32 +113,18 @@ int isci_host_scan_finished(struct Scsi_Host *shost, unsigned long time)
 {
        struct isci_host *ihost = isci_host_from_sas_ha(SHOST_TO_SAS_HA(shost));
 
-       /**
-        * check interrupt_handler's status and call completion_handler if true,
-        * link_up events should be coming from the scu core lib, as phy's come
-        * online. for each link_up from the core, call
-        * get_received_identify_address_frame, copy the frame into the
-        * sas_phy object and call libsas notify_port_event(PORTE_BYTES_DMAED).
-        * continue to return zero from thee scan_finished routine until
-        * the scic_cb_controller_start_complete() call comes from the core.
-        **/
-       if (scic_sds_controller_isr(ihost->core_controller))
-               scic_sds_controller_completion_handler(ihost->core_controller);
-
-       if (test_bit(IHOST_START_PENDING, &ihost->flags) && time < HZ*10) {
-               dev_dbg(&ihost->pdev->dev,
-                       "%s: ihost->status = %d, time = %ld\n",
-                            __func__, isci_host_get_state(ihost), time);
+       if (test_bit(IHOST_START_PENDING, &ihost->flags))
                return 0;
-       }
 
+       /* todo: use sas_flush_discovery once it is upstream */
+       scsi_flush_work(shost);
+
+       scsi_flush_work(shost);
 
        dev_dbg(&ihost->pdev->dev,
                "%s: ihost->status = %d, time = %ld\n",
                 __func__, isci_host_get_state(ihost), time);
 
-       scic_controller_enable_interrupts(ihost->core_controller);
-
        return 1;
 
 }
@@ -150,8 +136,11 @@ void isci_host_scan_start(struct Scsi_Host *shost)
        unsigned long tmo = scic_controller_get_suggested_start_timeout(scic);
 
        set_bit(IHOST_START_PENDING, &ihost->flags);
-       scic_controller_disable_interrupts(ihost->core_controller);
+
+       spin_lock_irq(&ihost->scic_lock);
        scic_controller_start(scic, tmo);
+       scic_controller_enable_interrupts(scic);
+       spin_unlock_irq(&ihost->scic_lock);
 }
 
 void isci_host_stop_complete(struct isci_host *ihost, enum sci_status completion_status)