[PATCH v3 01/10] block.c: assert bs->aio_context is written under BQL and drains

[Emanuele Giuseppe Esposito <eesposit@redhat.com>]

Also here ->aio_context is read by I/O threads and written
under BQL.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
---
 block.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/block.c b/block.c
index 554ce727c3..529be80759 100644
--- a/block.c
+++ b/block.c
@@ -7153,6 +7153,7 @@ static void bdrv_detach_aio_context(BlockDriverState *bs)
     if (bs->quiesce_counter) {
         aio_enable_external(bs->aio_context);
     }
+    assert_bdrv_graph_writable(bs);
     bs->aio_context = NULL;
 }
 
@@ -7166,6 +7167,7 @@ static void bdrv_attach_aio_context(BlockDriverState *bs,
         aio_disable_external(new_context);
     }
 
+    assert_bdrv_graph_writable(bs);
     bs->aio_context = new_context;
 
     if (bs->drv && bs->drv->bdrv_attach_aio_context) {
-- 
2.31.1