The function bdrv_drop_intermediate() calls bdrv_drained_begin(),
which must be called with the graph unlocked.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
 include/block/block-global-state.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/block/block-global-state.h b/include/block/block-global-state.h
index 55f84c1f8f..ad78fa6498 100644
--- a/include/block/block-global-state.h
+++ b/include/block/block-global-state.h
@@ -143,9 +143,10 @@ int bdrv_commit(BlockDriverState *bs);
 int GRAPH_RDLOCK bdrv_make_empty(BdrvChild *c, Error **errp);
 
 void bdrv_register(BlockDriver *bdrv);
-int bdrv_drop_intermediate(BlockDriverState *top, BlockDriverState *base,
-                           const char *backing_file_str,
-                           bool backing_mask_protocol);
+int GRAPH_UNLOCKED
+bdrv_drop_intermediate(BlockDriverState *top, BlockDriverState *base,
+                       const char *backing_file_str,
+                       bool backing_mask_protocol);
 
 BlockDriverState * GRAPH_RDLOCK
 bdrv_find_overlay(BlockDriverState *active, BlockDriverState *bs);
-- 
2.39.5