From f7822aa8b610a4fec57a09066974e5c088592c08 Mon Sep 17 00:00:00 2001
From: Cornelia Huck <cornelia.huck@de.ibm.com>
Date: Mon, 27 Jul 2015 16:55:23 +0200
Subject: [PATCH] s390x/event-facility: fix location of receive mask

For read event mask, we assumed that the layout of the sccb was

|sccb header|event buffer header|receive mask|...|

The correct layout, however, is

|sccb header|receive mask|...|

as in-buffer and

|sccb header|event buffer header|...|

as out-buffer.

Fix this: This makes selective read work.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
 include/hw/s390x/event-facility.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/hw/s390x/event-facility.h b/include/hw/s390x/event-facility.h
index 6a062b668af5..871f3e7f1116 100644
--- a/include/hw/s390x/event-facility.h
+++ b/include/hw/s390x/event-facility.h
@@ -146,8 +146,10 @@ typedef struct WriteEventData {
 
 typedef struct ReadEventData {
     SCCBHeader h;
-    EventBufferHeader ebh;
-    uint32_t mask;
+    union {
+        uint32_t mask;
+        EventBufferHeader ebh;
+    };
 } QEMU_PACKED ReadEventData;
 
 typedef struct SCLPEvent {