diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/stream.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/block/stream.c b/block/stream.c index 6e281c71ac..6a525a5edf 100644 --- a/block/stream.c +++ b/block/stream.c @@ -65,6 +65,7 @@ static int stream_prepare(Job *job) BlockDriverState *bs = blk_bs(bjob->blk); BlockDriverState *unfiltered_bs = bdrv_skip_filters(bs); BlockDriverState *base = bdrv_filter_or_cow_bs(s->above_base); + BlockDriverState *unfiltered_base = bdrv_skip_filters(base); Error *local_err = NULL; int ret = 0; @@ -73,10 +74,10 @@ static int stream_prepare(Job *job) if (bdrv_cow_child(unfiltered_bs)) { const char *base_id = NULL, *base_fmt = NULL; - if (base) { - base_id = s->backing_file_str; - if (base->drv) { - base_fmt = base->drv->format_name; + if (unfiltered_base) { + base_id = s->backing_file_str ?: unfiltered_base->filename; + if (unfiltered_base->drv) { + base_fmt = unfiltered_base->drv->format_name; } } bdrv_set_backing_hd(unfiltered_bs, base, &local_err); |