@@ -2010,14 +2010,17 @@ static int zero_in_l2_slice(BlockDriverState *bs, uint64_t offset,
continue;
}
+ /* First update L2 entries */
qcow2_cache_entry_mark_dirty(s->l2_table_cache, l2_slice);
- if (unmap) {
- qcow2_free_any_cluster(bs, old_l2_entry, QCOW2_DISCARD_REQUEST);
- }
set_l2_entry(s, l2_slice, l2_index + i, new_l2_entry);
if (has_subclusters(s)) {
set_l2_bitmap(s, l2_slice, l2_index + i, new_l2_bitmap);
}
+
+ /* Then decrease the refcount */
+ if (unmap) {
+ qcow2_free_any_cluster(bs, old_l2_entry, QCOW2_DISCARD_REQUEST);
+ }
}
qcow2_cache_put(s->l2_table_cache, (void **) &l2_slice);