Commit 77cd72a5 authored Jul 29, 2011 by Dan Williams Committed by James Bottomley Aug 23, 2011

[SCSI] isci: fix event-get pointer increment



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>

parent 9b4be528

drivers/scsi/isci/host.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);