[Xen-changelog] [xen-unstable] Raise an exception if blkdev_name_to_number fails, to improve the error message.

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

# HG changeset patch
# User Ewan Mellor <ewan@xxxxxxxxxxxxx>
# Node ID cc6f0a3596fc691986d4eed8e6ec0ea8ee7b9780
# Parent  f9446aa6c78632131be1c3042dcc3693e8828136
Raise an exception if blkdev_name_to_number fails, to improve the error message.

Fix came from Glauber de Oliveira Costa, and is one half of xen-unstable
11831:f5321161c649fe4f07027250c4a1f3c4b5fc2ed9.

Signed-off-by: Ewan Mellor <ewan@xxxxxxxxxxxxx>
---
 tools/python/xen/xend/server/blkif.py |    3 +++
 1 files changed, 3 insertions(+)

diff -r f9446aa6c786 -r cc6f0a3596fc tools/python/xen/xend/server/blkif.py
--- a/tools/python/xen/xend/server/blkif.py     Thu Oct 05 16:17:06 2006 +0100
+++ b/tools/python/xen/xend/server/blkif.py     Sat Oct 28 17:58:00 2006 +0100
@@ -80,6 +80,9 @@ class BlkifController(DevController):
                          'acm_policy' : policy})
 
         devid = blkif.blkdev_name_to_number(dev)
+        if not devid:
+            raise VmError('Unable to find number for device (%s)' % (dev))
+
         front = { 'virtual-device' : "%i" % devid,
                   'device-type' : dev_type
                 }

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