Check if any hugepages are allocated before unallocating them

libvirt_hooks/hooks/unalloc_hugepages.sh

@@ -1,10 +1,10 @@
 #! /bin/bash
 #
-# Author: 
+# Author:
 #
 # This hook automatically (un-)allocates static HugePages when starting/stopping a VM.
 # This file depends on the Passthrough POST hook helper script found in this repo.
-# Place this script in BOTH these directories (or symlink it): 
+# Place this script in BOTH these directories (or symlink it):
 # $SYSCONFDIR/libvirt/hooks/qemu.d/your_vm/prepare/begin/
 # $SYSCONFDIR/libvirt/hooks/qemu.d/your_vm/release/end/
 # $SYSCONFDIR usually is /etc/libvirt.
@@ -27,5 +27,7 @@ function unallocPages {
     echo $HPG_NEW > $HPG_PATH
 }
 
-# Call function to unallocate HugePages
-unallocPages
+# Call function to unallocate HugePages if HugePage count is greater than 0
+if [[ HPG_SIZE -gt 0 ]]; then
+    unallocPages
+fi