patch tsoome-feedback
6659 nvlist_free(NULL) is a no-op

@@ -714,13 +714,11 @@
                 }
                 nvlist_free(other_attrs);
         }
 
 out:
-        if (media_attrs)
                 nvlist_free(media_attrs);
-        if (slice_attrs)
                 nvlist_free(slice_attrs);
 
         if (slices)
                 dm_free_descriptors(slices);
         if (media)

@@ -1055,11 +1053,10 @@
                 }
         }
 out:
         if (dname != NULL)
                 free(dname);
-        if (dev_stats != NULL)
                 nvlist_free(dev_stats);
 
         return (found);
 }