[PATCH 2/4] When all udev_is-foo() checks fail return instead of backtracing

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While testing isw bios raid using mdraid, I hit a backtrace caused
by all udev_is-foo() checks failing. This pathc logs an error and
ignores the device instead of backtracing. I believe this may work
around quite a few "'NoneType' object has no attribute Name" bugs we
have open at the moment.
---
 storage/devicetree.py |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/storage/devicetree.py b/storage/devicetree.py
index 08846f3..d91fcba 100644
--- a/storage/devicetree.py
+++ b/storage/devicetree.py
@@ -1279,6 +1279,9 @@ class DeviceTree(object):
             log.debug("%s is a partition" % name)
             if device is None:
                 device = self.addUdevPartitionDevice(info)
+        else:
+            log.error("Unknow block device type for: %s" % name)
+            return
 
         # If this device is protected, mark it as such now. Once the tree
         # has been populated, devices' protected attribute is how we will
-- 
1.6.2.2

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