Signed-off-by: Frediano Ziglio <fredd...@gmail.com>
---
block/qcow2-refcount.c | 11 +++++------
1 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 0e31868..318d66d 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -681,14 +681,13 @@ void qcow2_create_refcount_update(QCowCreateState *s,
int64_t offset,
int64_t size)
{
int refcount;
- int64_t start, last, cluster_offset;
+ int64_t start, last, cluster;
uint16_t *p;
- start = offset & ~(s->cluster_size - 1);
- last = (offset + size - 1) & ~(s->cluster_size - 1);
- for(cluster_offset = start; cluster_offset <= last;
- cluster_offset += s->cluster_size) {
- p = &s->refcount_block[cluster_offset >> s->cluster_bits];
+ start = offset >> s->cluster_bits;
+ last = (offset + size - 1) >> s->cluster_bits;
+ for (cluster = start; cluster <= last; ++cluster) {
+ p = &s->refcount_block[cluster];
refcount = be16_to_cpu(*p);
refcount++;
*p = cpu_to_be16(refcount);
--
1.7.1
