From: Dan Williams <dan.j.williams@intel.com>
Date: Sat, 30 Jul 2011 00:17:16 +0000 (-0700)
Subject: isci: fix event-get pointer increment
X-Git-Tag: v3.0.5~44
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9185560808a0dc0432b130ca9d9965cb7ce052a6;p=karo-tx-linux.git

isci: fix event-get pointer increment

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@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index 26072f1e9852..ef46d8323377 100644
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -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);