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-rw-r--r--block/io.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/block/io.c b/block/io.c
index 02528b3823..6fe1b275b6 100644
--- a/block/io.c
+++ b/block/io.c
@@ -2282,17 +2282,17 @@ static int coroutine_fn bdrv_co_block_status(BlockDriverState *bs,
if (ret & (BDRV_BLOCK_DATA | BDRV_BLOCK_ZERO)) {
ret |= BDRV_BLOCK_ALLOCATED;
- } else if (want_zero && bs->drv->supports_backing) {
+ } else if (bs->drv->supports_backing) {
BlockDriverState *cow_bs = bdrv_cow_bs(bs);
- if (cow_bs) {
+ if (!cow_bs) {
+ ret |= BDRV_BLOCK_ZERO;
+ } else if (want_zero) {
int64_t size2 = bdrv_getlength(cow_bs);
if (size2 >= 0 && offset >= size2) {
ret |= BDRV_BLOCK_ZERO;
}
- } else {
- ret |= BDRV_BLOCK_ZERO;
}
}