diff options
| -rw-r--r-- | block/qcow2.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 73f36447f9..b00b4e7575 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1619,9 +1619,11 @@ qcow2_do_open(BlockDriverState *bs, QDict *options, int flags, if (open_data_file) { /* Open external data file */ + bdrv_graph_co_rdunlock(); s->data_file = bdrv_co_open_child(NULL, options, "data-file", bs, &child_of_bds, BDRV_CHILD_DATA, true, errp); + bdrv_graph_co_rdlock(); if (*errp) { ret = -EINVAL; goto fail; @@ -1629,10 +1631,12 @@ qcow2_do_open(BlockDriverState *bs, QDict *options, int flags, if (s->incompatible_features & QCOW2_INCOMPAT_DATA_FILE) { if (!s->data_file && s->image_data_file) { + bdrv_graph_co_rdunlock(); s->data_file = bdrv_co_open_child(s->image_data_file, options, "data-file", bs, &child_of_bds, BDRV_CHILD_DATA, false, errp); + bdrv_graph_co_rdlock(); if (!s->data_file) { ret = -EINVAL; goto fail; @@ -1857,7 +1861,9 @@ qcow2_do_open(BlockDriverState *bs, QDict *options, int flags, fail: g_free(s->image_data_file); if (open_data_file && has_data_file(bs)) { + bdrv_graph_co_rdunlock(); bdrv_unref_child(bs, s->data_file); + bdrv_graph_co_rdlock(); s->data_file = NULL; } g_free(s->unknown_header_fields); |