[storage] marks actual devices as protected/unprotected (avoids ances…

…tors)

As of F39, the protection of the device where live media is located  was hardened. This breaks installation for users with single disks who want to boot their live media from an iso file or from a logical volume.

This change skips protection/unprotection of the ancestors and works directly on the passed device

pyanaconda/modules/storage/devicetree/model.py

@@ -350,22 +350,16 @@ def protect_devices(self, protected_names):
         self.protected_devices = protected_names
 
     def _mark_protected_device(self, device):
-        """Mark a device and its ancestors as protected."""
-        if not device:
-            return
-
-        for d in device.ancestors:
-            log.debug("Marking device %s as protected.", d.name)
-            d.protected = True
+        """Mark a device as protected from teardown."""
+        if device:
+            log.debug("Marking device %s as protected.", device.name)
+            device.protected = True
 
     def _mark_unprotected_device(self, device):
-        """Mark a device and its ancestors as unprotected."""
-        if not device:
-            return
-
-        for d in device.ancestors:
-            log.debug("Marking device %s as unprotected.", d.name)
-            d.protected = False
+        """Mark a device as unprotected from teardown."""
+        if device:
+            log.debug("Marking device %s as unprotected.", device.name)
+            device.protected = False
 
     @property
     def usable_disks(self):