From 5237d16d69cf54487b72dd8d12862cb4339efcbc Mon Sep 17 00:00:00 2001
From: Eric Harney <eharney@redhat.com>
Date: Tue, 30 Aug 2016 10:59:52 -0400
Subject: [PATCH] LVM: Handle missing loop device at cleanup

When the loop device is not present because something
has gone wrong, this will print an error:
"losetup: option requires an argument -- 'd'"

Just skip the losetup -d in this case.

Change-Id: Iedc439b1ae924e9a599f6522eb081b83d43190c7
---
 lib/lvm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/lvm b/lib/lvm
index b9d7c390a2..d35a76fb5f 100644
--- a/lib/lvm
+++ b/lib/lvm
@@ -58,7 +58,9 @@ function _clean_lvm_backing_file {
     if [[ -n "$backing_file" ]] && [[ -e "$backing_file" ]]; then
         local vg_dev
         vg_dev=$(sudo losetup -j $backing_file | awk -F':' '/'$BACKING_FILE_SUFFIX'/ { print $1}')
-        sudo losetup -d $vg_dev
+        if [[ -n "$vg_dev" ]]; then
+            sudo losetup -d $vg_dev
+        fi
         rm -f $backing_file
     fi
 }