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-rw-r--r--block/qcow2-cluster.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index 9cc8f0f3e4..660161bf00 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -389,12 +389,12 @@ static int count_contiguous_clusters(BlockDriverState *bs, int nb_clusters,
uint64_t first_entry = be64_to_cpu(l2_slice[0]);
uint64_t offset = first_entry & mask;
- if (!offset) {
+ first_cluster_type = qcow2_get_cluster_type(bs, first_entry);
+ if (first_cluster_type == QCOW2_CLUSTER_UNALLOCATED) {
return 0;
}
/* must be allocated */
- first_cluster_type = qcow2_get_cluster_type(bs, first_entry);
assert(first_cluster_type == QCOW2_CLUSTER_NORMAL ||
first_cluster_type == QCOW2_CLUSTER_ZERO_ALLOC);