[201/244] [SCSI] isci: fix event-get pointer increment

[Greg KH]

3.0-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Dan Williams <dan.j.williams@xxxxxxxxx>

commit 77cd72a53f6426f81b7f56a862402849ee903bda upstream.

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@xxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: James Bottomley <JBottomley@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/scsi/isci/host.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -531,6 +531,9 @@ static void sci_controller_process_compl
 			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);


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