1 files changed, 29 insertions, 24 deletions

diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index 542080aed0..3f7272441d 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -299,38 +299,43 @@ static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
     /* allocate a new entry in the l2 cache */
 
     trace_qcow2_l2_allocate_get_empty(bs, l1_index);
-    ret = qcow2_cache_get_empty(bs, s->l2_table_cache, l2_offset, (void**) table);
-    if (ret < 0) {
-        goto fail;
-    }
+    {
+        ret = qcow2_cache_get_empty(bs, s->l2_table_cache,
+                                    l2_offset,
+                                    (void **) table);
+        if (ret < 0) {
+            goto fail;
+        }
 
-    l2_table = *table;
+        l2_table = *table;
 
-    if ((old_l2_offset & L1E_OFFSET_MASK) == 0) {
-        /* if there was no old l2 table, clear the new table */
-        memset(l2_table, 0, s->l2_size * sizeof(uint64_t));
-    } else {
-        uint64_t* old_table;
+        if ((old_l2_offset & L1E_OFFSET_MASK) == 0) {
+            /* if there was no old l2 table, clear the new table */
+            memset(l2_table, 0, s->l2_size * sizeof(uint64_t));
+        } else {
+            uint64_t *old_table;
 
-        /* if there was an old l2 table, read it from the disk */
-        BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_COW_READ);
-        ret = qcow2_cache_get(bs, s->l2_table_cache,
-            old_l2_offset & L1E_OFFSET_MASK,
-            (void**) &old_table);
-        if (ret < 0) {
-            goto fail;
+            /* if there was an old l2 table, read it from the disk */
+            BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_COW_READ);
+            ret = qcow2_cache_get(bs, s->l2_table_cache,
+                                  old_l2_offset & L1E_OFFSET_MASK,
+                                  (void **) &old_table);
+            if (ret < 0) {
+                goto fail;
+            }
+
+            memcpy(l2_table, old_table, s->cluster_size);
+
+            qcow2_cache_put(s->l2_table_cache, (void **) &old_table);
         }
 
-        memcpy(l2_table, old_table, s->cluster_size);
+        /* write the l2 table to the file */
+        BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_WRITE);
 
-        qcow2_cache_put(s->l2_table_cache, (void **) &old_table);
+        trace_qcow2_l2_allocate_write_l2(bs, l1_index);
+        qcow2_cache_entry_mark_dirty(s->l2_table_cache, l2_table);
     }
 
-    /* write the l2 table to the file */
-    BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_WRITE);
-
-    trace_qcow2_l2_allocate_write_l2(bs, l1_index);
-    qcow2_cache_entry_mark_dirty(s->l2_table_cache, l2_table);
     ret = qcow2_cache_flush(bs, s->l2_table_cache);
     if (ret < 0) {
         goto fail;