4 files changed, 29 insertions, 0 deletions
diff --git a/block.c b/block.c
index 430edf7..ee5b28a 100644
--- a/block.c
+++ b/block.c
@@ -4458,6 +4458,15 @@ static void bdrv_close(BlockDriverState *bs)
     }
     QLIST_INIT(&bs->aio_notifiers);
     bdrv_drained_end(bs);
+
+    /*
+     * If we're still inside some bdrv_drain_all_begin()/end() sections, end
+     * them now since this BDS won't exist anymore when bdrv_drain_all_end()
+     * gets called.
+     */
+    if (bs->quiesce_counter) {
+        bdrv_drain_all_end_quiesce(bs);
+    }
 }
 
 void bdrv_close_all(void)
diff --git a/block/io.c b/block/io.c
index c33cecd..9918f24 100644
--- a/block/io.c
+++ b/block/io.c
@@ -633,6 +633,19 @@ void bdrv_drain_all_begin(void)
     }
 }
 
+void bdrv_drain_all_end_quiesce(BlockDriverState *bs)
+{
+    int drained_end_counter = 0;
+
+    g_assert(bs->quiesce_counter > 0);
+    g_assert(!bs->refcnt);
+
+    while (bs->quiesce_counter) {
+        bdrv_do_drained_end(bs, false, NULL, true, &drained_end_counter);
+    }
+    BDRV_POLL_WHILE(bs, qatomic_read(&drained_end_counter) > 0);
+}
+
 void bdrv_drain_all_end(void)
 {
     BlockDriverState *bs = NULL;
diff --git a/include/block/block.h b/include/block/block.h
index c9d7c58..4bfe3b5 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -782,6 +782,12 @@ void bdrv_drained_end(BlockDriverState *bs);
 void bdrv_drained_end_no_poll(BlockDriverState *bs, int *drained_end_counter);
 
 /**
+ * End all quiescent sections started by bdrv_drain_all_begin(). This is
+ * only needed when deleting a BDS before bdrv_drain_all_end() is called.
+ */
+void bdrv_drain_all_end_quiesce(BlockDriverState *bs);
+
+/**
  * End a quiescent section started by bdrv_subtree_drained_begin().
  */
 void bdrv_subtree_drained_end(BlockDriverState *bs);
diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
index 1595bbc..8a29e33 100644
--- a/tests/test-bdrv-drain.c
+++ b/tests/test-bdrv-drain.c
@@ -594,6 +594,7 @@ static void test_graph_change_drain_all(void)
 
     g_assert_cmpint(bs_b->quiesce_counter, ==, 0);
     g_assert_cmpint(b_s->drain_count, ==, 0);
+    g_assert_cmpint(qemu_get_aio_context()->external_disable_cnt, ==, 0);
 
     bdrv_unref(bs_b);
     blk_unref(blk_b);