[PATCH 04/11] block: drain while unlocked in bdrv_reopen_parse_file_or_backing()

[Fiona Ebner]

This is in preparation to mark bdrv_drained_begin() as GRAPH_UNLOCKED.

Signed-off-by: Fiona Ebner <f.eb...@proxmox.com>
---
 block.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/block.c b/block.c
index 0085dbfa74..c7c26533c9 100644
--- a/block.c
+++ b/block.c
@@ -4805,10 +4805,11 @@ bdrv_reopen_parse_file_or_backing(BDRVReopenState 
*reopen_state,
 
     if (old_child_bs) {
         bdrv_ref(old_child_bs);
+        bdrv_graph_rdunlock_main_loop();
         bdrv_drained_begin(old_child_bs);
+    } else {
+        bdrv_graph_rdunlock_main_loop();
     }
-
-    bdrv_graph_rdunlock_main_loop();
     bdrv_graph_wrlock();
 
     ret = bdrv_set_file_or_backing_noperm(bs, new_child_bs, is_backing,
-- 
2.39.5