ivshmem_patch.diff

diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index d66d912172..aeff5b8a38 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -43,7 +43,7 @@
 #define PCI_VENDOR_ID_IVSHMEM   PCI_VENDOR_ID_REDHAT_QUMRANET
 #define PCI_DEVICE_ID_IVSHMEM   0x1110
 
-#define IVSHMEM_MAX_PEERS UINT16_MAX
+#define IVSHMEM_MAX_PEERS 244 /* available bytes in BAR0 */
 #define IVSHMEM_IOEVENTFD   0
 #define IVSHMEM_MSI     1
 
@@ -363,20 +363,20 @@ static void watch_vector_notifier(IVShmemState *s, EventNotifier *n,
 static void ivshmem_add_eventfd(IVShmemState *s, int posn, int i)
 {
     memory_region_add_eventfd(&s->ivshmem_mmio,
-                              DOORBELL,
-                              4,
-                              true,
-                              (posn << 16) | i,
+                              DOORBELL + posn,
+                              0,
+                              false,
+                              0,
                               &s->peers[posn].eventfds[i]);
 }
 
 static void ivshmem_del_eventfd(IVShmemState *s, int posn, int i)
 {
     memory_region_del_eventfd(&s->ivshmem_mmio,
-                              DOORBELL,
-                              4,
-                              true,
-                              (posn << 16) | i,
+                              DOORBELL + posn,
+                              0,
+                              false,
+                              0,
                               &s->peers[posn].eventfds[i]);
 }