diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h
index 013d419444..6fb28cd8fa 100644
--- a/include/block/block_int-common.h
+++ b/include/block/block_int-common.h
@@ -236,12 +236,12 @@ struct BlockDriver {
     void (*bdrv_reopen_abort)(BDRVReopenState *reopen_state);
     void (*bdrv_join_options)(QDict *options, QDict *old_options);
 
-    int (*bdrv_open)(BlockDriverState *bs, QDict *options, int flags,
-                     Error **errp);
+    int GRAPH_UNLOCKED_PTR (*bdrv_open)(
+        BlockDriverState *bs, QDict *options, int flags, Error **errp);
 
     /* Protocol drivers should implement this instead of bdrv_open */
-    int (*bdrv_file_open)(BlockDriverState *bs, QDict *options, int flags,
-                          Error **errp);
+    int GRAPH_UNLOCKED_PTR (*bdrv_file_open)(
+        BlockDriverState *bs, QDict *options, int flags, Error **errp);
     void (*bdrv_close)(BlockDriverState *bs);
 
     int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_create)(
diff --git a/block.c b/block.c
index 20d5ee0959..abec940867 100644
--- a/block.c
+++ b/block.c
@@ -1610,9 +1610,9 @@ out:
  * bdrv_refresh_total_sectors() which polls when called from non-coroutine
  * context.
  */
-static int bdrv_open_driver(BlockDriverState *bs, BlockDriver *drv,
-                            const char *node_name, QDict *options,
-                            int open_flags, Error **errp)
+static int no_coroutine_fn GRAPH_UNLOCKED
+bdrv_open_driver(BlockDriverState *bs, BlockDriver *drv, const char *node_name,
+                 QDict *options, int open_flags, Error **errp)
 {
     Error *local_err = NULL;
     int i, ret;
diff --git a/block/qcow2.c b/block/qcow2.c
index 01742b3ebe..5bde3b8401 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1891,7 +1891,7 @@ static void coroutine_fn qcow2_open_entry(void *opaque)
     QCow2OpenCo *qoc = opaque;
     BDRVQcow2State *s = qoc->bs->opaque;
 
-    assume_graph_lock(); /* FIXME */
+    GRAPH_RDLOCK_GUARD();
 
     qemu_co_mutex_lock(&s->lock);
     qoc->ret = qcow2_do_open(qoc->bs, qoc->options, qoc->flags, true,
@@ -1920,14 +1920,11 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
     /* Initialise locks */
     qemu_co_mutex_init(&s->lock);
 
-    if (qemu_in_coroutine()) {
-        /* From bdrv_co_create.  */
-        qcow2_open_entry(&qoc);
-    } else {
-        assert(qemu_get_current_aio_context() == qemu_get_aio_context());
-        qemu_coroutine_enter(qemu_coroutine_create(qcow2_open_entry, &qoc));
-        BDRV_POLL_WHILE(bs, qoc.ret == -EINPROGRESS);
-    }
+    assert(!qemu_in_coroutine());
+    assert(qemu_get_current_aio_context() == qemu_get_aio_context());
+    qemu_coroutine_enter(qemu_coroutine_create(qcow2_open_entry, &qoc));
+    BDRV_POLL_WHILE(bs, qoc.ret == -EINPROGRESS);
+
     return qoc.ret;
 }
 
diff --git a/block/qed.c b/block/qed.c
index aff2a2076e..be9ff0fb34 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -557,11 +557,13 @@ typedef struct QEDOpenCo {
     int ret;
 } QEDOpenCo;
 
-static void coroutine_fn GRAPH_RDLOCK bdrv_qed_open_entry(void *opaque)
+static void coroutine_fn bdrv_qed_open_entry(void *opaque)
 {
     QEDOpenCo *qoc = opaque;
     BDRVQEDState *s = qoc->bs->opaque;
 
+    GRAPH_RDLOCK_GUARD();
+
     qemu_co_mutex_lock(&s->table_lock);
     qoc->ret = bdrv_qed_do_open(qoc->bs, qoc->options, qoc->flags, qoc->errp);
     qemu_co_mutex_unlock(&s->table_lock);
@@ -579,21 +581,17 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
     };
     int ret;
 
-    assume_graph_lock(); /* FIXME */
-
     ret = bdrv_open_file_child(NULL, options, "file", bs, errp);
     if (ret < 0) {
         return ret;
     }
 
     bdrv_qed_init_state(bs);
-    if (qemu_in_coroutine()) {
-        bdrv_qed_open_entry(&qoc);
-    } else {
-        assert(qemu_get_current_aio_context() == qemu_get_aio_context());
-        qemu_coroutine_enter(qemu_coroutine_create(bdrv_qed_open_entry, &qoc));
-        BDRV_POLL_WHILE(bs, qoc.ret == -EINPROGRESS);
-    }
+    assert(!qemu_in_coroutine());
+    assert(qemu_get_current_aio_context() == qemu_get_aio_context());
+    qemu_coroutine_enter(qemu_coroutine_create(bdrv_qed_open_entry, &qoc));
+    BDRV_POLL_WHILE(bs, qoc.ret == -EINPROGRESS);
+
     return qoc.ret;
 }
 
