fix: cryptsetup close

zfs-backup.py

@@ -316,7 +316,7 @@ class Disk:
         if not self._decrypted:
             raise ValueError(NOT_DECRYPTED, self._name)
         # TODO use run instead?
-        get_output_of_command([config.CRYPTSETUP, "close", self._name])
+        get_output_of_command([config.CRYPTSETUP, "close", self._mapper_entry])
         self._decrypted = False