Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20141015' into staging

migration/next for 20141015

# gpg: Signature made Wed 15 Oct 2014 09:21:54 BST using RSA key ID 5872D723
# gpg: Can't check signature: public key not found

* remotes/juanquintela/tags/migration/20141015:
  migration: catch unknown flag combinations in ram_load
  qemu-file: Move stdio implementation to qemu-file-stdio.c
  qemu-file: Move unix and socket implementations to qemu-file-unix.c
  qemu-file: Use qemu_file_is_writable() on stdio_fclose()
  qemu-file: Make qemu_file_is_writable() non-static
  qemu-file: Add copyright header to qemu-file.c
  vmstate: Allow dynamic allocation for VBUFFER during migration
  block/migration: Disable cache invalidate for incoming migration
  Tests: QEMUSizedBuffer/QEMUBuffer
  QEMUSizedBuffer based QEMUFile

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 10 insertions, 3 deletions

diff --git a/vmstate.c b/vmstate.c
index ef2f87b..3dde574 100644
--- a/vmstate.c
+++ b/vmstate.c
@@ -49,9 +49,16 @@ static void *vmstate_base_addr(void *opaque, VMStateField *field, bool alloc)
 
     if (field->flags & VMS_POINTER) {
         if (alloc && (field->flags & VMS_ALLOC)) {
-            int n_elems = vmstate_n_elems(opaque, field);
-            if (n_elems) {
-                gsize size = n_elems * field->size;
+            gsize size = 0;
+            if (field->flags & VMS_VBUFFER) {
+                size = vmstate_size(opaque, field);
+            } else {
+                int n_elems = vmstate_n_elems(opaque, field);
+                if (n_elems) {
+                    size = n_elems * field->size;
+                }
+            }
+            if (size) {
                 *((void **)base_addr + field->start) = g_malloc(size);
             }
         }