[Xen-changelog] [xen-unstable] xend: fix empty 'cpus' parsing

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

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1260777552 0
# Node ID 7088591b454bb6ed02d2f1ddd4947ced29e6ab4f
# Parent  73ff2d056e368e56cc85aa992de2bccc466ba92e
xend: fix empty 'cpus' parsing

/etc/xen/xmexample.hvm says "" means "leave to Xen to pick", but we
get a "Error: string index out of range" currently.

Signed-off-by: Dexuan Cui <dexuan.cui@xxxxxxxxx>
---
 tools/python/xen/xend/XendConfig.py |    2 ++
 1 files changed, 2 insertions(+)

diff -r 73ff2d056e36 -r 7088591b454b tools/python/xen/xend/XendConfig.py
--- a/tools/python/xen/xend/XendConfig.py       Mon Dec 14 07:58:47 2009 +0000
+++ b/tools/python/xen/xend/XendConfig.py       Mon Dec 14 07:59:12 2009 +0000
@@ -577,6 +577,8 @@ class XendConfig(dict):
         #    "0-3,^1"   -> [0,2,3]
         #    "0-3,^1,1" -> [0,1,2,3]
         l = []
+        if s == "":
+            return l
         for c in s.split(','):
             if c.find('-') != -1:
                 (x, y) = c.split('-')

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