diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index f2b1994..fb1b9b8 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3847,6 +3847,10 @@ static void cancel_tasks_sync(struct rbd_device *rbd_dev)
 	cancel_work_sync(&rbd_dev->unlock_work);
 }
 
+/*
+ * header_rwsem must not be held to avoid a deadlock with
+ * rbd_dev_refresh() when flushing notifies.
+ */
 static void rbd_unregister_watch(struct rbd_device *rbd_dev)
 {
 	WARN_ON(waitqueue_active(&rbd_dev->lock_waitq));
@@ -6057,6 +6061,9 @@ static void rbd_dev_image_release(struct rbd_device *rbd_dev)
  * device.  If this image is the one being mapped (i.e., not a
  * parent), initiate a watch on its header object before using that
  * object to get detailed information about the rbd image.
+ *
+ * On success, returns with header_rwsem held for write if called
+ * with @depth == 0.
  */
 static int rbd_dev_image_probe(struct rbd_device *rbd_dev, int depth)
 {
@@ -6087,6 +6094,9 @@ static int rbd_dev_image_probe(struct rbd_device *rbd_dev, int depth)
 		}
 	}
 
+	if (!depth)
+		down_write(&rbd_dev->header_rwsem);
+
 	ret = rbd_dev_header_info(rbd_dev);
 	if (ret)
 		goto err_out_watch;
@@ -6136,6 +6146,8 @@ static int rbd_dev_image_probe(struct rbd_device *rbd_dev, int depth)
 	rbd_dev_unprobe(rbd_dev);
 err_out_watch:
 	if (!depth)
+		up_write(&rbd_dev->header_rwsem);
+	if (!depth)
 		rbd_unregister_watch(rbd_dev);
 err_out_format:
 	rbd_dev->image_format = 0;
@@ -6194,12 +6206,9 @@ static ssize_t do_rbd_add(struct bus_type *bus,
 		goto err_out_rbd_dev;
 	}
 
-	down_write(&rbd_dev->header_rwsem);
 	rc = rbd_dev_image_probe(rbd_dev, 0);
-	if (rc < 0) {
-		up_write(&rbd_dev->header_rwsem);
+	if (rc < 0)
 		goto err_out_rbd_dev;
-	}
 
 	/* If we are mapping a snapshot it must be marked read-only */