[PATCH 3/4] Sort singlePV=True requests so they come first.

[David Cantrell]

As another way to ensure the singlePV asVol requests get full pick of
what PV they want to destroy, make sure they come before the regular
asVol requests.

(Code from Dave Lehman )

Related: rhbz#618376
---
 storage/devicetree.py |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/storage/devicetree.py b/storage/devicetree.py
index f74d9d2..5c213ff 100644
--- a/storage/devicetree.py
+++ b/storage/devicetree.py
@@ -610,6 +610,13 @@ class DeviceTree(object):
                                   a2.device.partedPartition.number)
                     else:
                         ret = cmp(a1.device.name, a2.device.name)
+                elif isinstance(a1.device, LVMLogicalVolumeDevice) and \
+                     isinstance(a2.device, LVMLogicalVolumeDevice) and \
+                     a1.device.vg == a2.device.vg:
+                    if a1.device.singlePV and not a2.device.singlePV:
+                        ret = -1
+                    elif not a1.device.singlePV and a2.device.singlePV:
+                        ret = 1
                 elif isinstance(a1.device, PartitionDevice) and \
                      a2.device.partitioned:
                     ret = 1