diff options
Diffstat (limited to 'block/io.c')
| -rw-r--r-- | block/io.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/block/io.c b/block/io.c index df8f2a98d4..b6564e34c5 100644 --- a/block/io.c +++ b/block/io.c @@ -2406,16 +2406,16 @@ 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) { - if (bdrv_unallocated_blocks_are_zero(bs)) { - ret |= BDRV_BLOCK_ZERO; - } else if (bs->backing) { + } else if (want_zero && bs->drv->supports_backing) { + if (bs->backing) { BlockDriverState *bs2 = bs->backing->bs; int64_t size2 = bdrv_getlength(bs2); if (size2 >= 0 && offset >= size2) { ret |= BDRV_BLOCK_ZERO; } + } else { + ret |= BDRV_BLOCK_ZERO; } } |