[Xen-changelog] [xen-unstable] Fix guest boot if set empty cdrom in config file

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

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1210670394 -3600
# Node ID 5d9430d492e3577d4c45909bef58710ad6a513b5
# Parent  7211d37de25b6073f0346bc8ff3f66e735952859
Fix guest boot if set empty cdrom in config file

This is because function "uname = config.get('uname', '')" returns '',
rather than None, if uname is not in config variable.

Signed-off-by: Xu Dongxiao <dongxiao.xu@xxxxxxxxx>
---
 tools/python/xen/xend/server/blkif.py |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r 7211d37de25b -r 5d9430d492e3 tools/python/xen/xend/server/blkif.py
--- a/tools/python/xen/xend/server/blkif.py     Tue May 13 10:16:54 2008 +0100
+++ b/tools/python/xen/xend/server/blkif.py     Tue May 13 10:19:54 2008 +0100
@@ -47,7 +47,7 @@ class BlkifController(DevController):
         except ValueError:
             dev_type = "disk"
 
-        if uname is None:
+        if uname == '':
             if dev_type == 'cdrom':
                 (typ, params) = ("", "")
             else:

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