[Xen-changelog] [xen-unstable] hvm: Ensure ioemu sees media-change events even when media filename

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1182346887 -3600
# Node ID 63077ce6a7dc729d8aac1564b8dc032289e2d905
# Parent  ea52a66e43a8b11084563a418995294d3dbff018
hvm: Ensure ioemu sees media-change events even when media filename
remains constant my writing a dummy blank string first.
Signed-off-by: Takanori Kasai <kasai.takanori@xxxxxxxxxxxxxx>
---
 tools/python/xen/xend/server/blkif.py |    5 +++++
 1 files changed, 5 insertions(+)

diff -r ea52a66e43a8 -r 63077ce6a7dc tools/python/xen/xend/server/blkif.py
--- a/tools/python/xen/xend/server/blkif.py     Wed Jun 20 14:36:11 2007 +0100
+++ b/tools/python/xen/xend/server/blkif.py     Wed Jun 20 14:41:27 2007 +0100
@@ -98,6 +98,11 @@ class BlkifController(DevController):
 
         if (dev_type == 'cdrom' and new_front['device-type'] == 'cdrom' and
             dev == new_back['dev'] and mode == 'r'):
+            # dummy device
+            self.writeBackend(devid,
+                              'type', new_back['type'],
+                              'params', '')
+            # new backend-device
             self.writeBackend(devid,
                               'type', new_back['type'],
                               'params', new_back['params'])

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