[SCSI] isci: fix event-get pointer increment
Dan Williams [Sat, 30 Jul 2011 00:17:16 +0000 (17:17 -0700)]
Hardware only increments the put pointer on event types >= 4.  Do not
increment the get pointer for event type 3.

Reported-by: Kapil Karkra <kapil.karkra@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/isci/host.c

index 2328f98..6981b77 100644 (file)
@@ -531,6 +531,9 @@ static void sci_controller_process_completions(struct isci_host *ihost)
                        break;
 
                case SCU_COMPLETION_TYPE_EVENT:
+                       sci_controller_event_completion(ihost, ent);
+                       break;
+
                case SCU_COMPLETION_TYPE_NOTIFY: {
                        event_cycle ^= ((event_get+1) & SCU_MAX_EVENTS) <<
                                       (SMU_COMPLETION_QUEUE_GET_EVENT_CYCLE_BIT_SHIFT - SCU_MAX_EVENTS_SHIFT);