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-rw-r--r--block/blklogwrites.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/block/blklogwrites.c b/block/blklogwrites.c
index b0f78c4bc7..70ac76f401 100644
--- a/block/blklogwrites.c
+++ b/block/blklogwrites.c
@@ -281,9 +281,11 @@ static int blk_log_writes_open(BlockDriverState *bs, QDict *options, int flags,
     ret = 0;
 fail_log:
     if (ret < 0) {
+        bdrv_drain_all_begin();
         bdrv_graph_wrlock();
         bdrv_unref_child(bs, s->log_file);
         bdrv_graph_wrunlock();
+        bdrv_drain_all_end();
         s->log_file = NULL;
         qemu_mutex_destroy(&s->mutex);
     }
@@ -296,10 +298,12 @@ static void blk_log_writes_close(BlockDriverState *bs)
 {
     BDRVBlkLogWritesState *s = bs->opaque;
 
+    bdrv_drain_all_begin();
     bdrv_graph_wrlock();
     bdrv_unref_child(bs, s->log_file);
     s->log_file = NULL;
     bdrv_graph_wrunlock();
+    bdrv_drain_all_end();
     qemu_mutex_destroy(&s->mutex);
 }