/* {"version":"v5.15-rc1~161", "commit": "14cf1dbb55bb07427babee425fd2a8a9300737cc", "comment": "block: remove bdgrab"} */

diff -Naur drbd-9.0.30~1+git.8e9c0812.orig/drbd/drbd_nl.c drbd-9.0.30~1+git.8e9c0812/drbd/drbd_nl.c
--- drbd-9.0.30~1+git.8e9c0812.orig/drbd/drbd_nl.c	2021-11-22 12:32:17.202848720 +0800
+++ drbd-9.0.30~1+git.8e9c0812/drbd/drbd_nl.c	2021-11-22 12:32:57.719098447 +0800
@@ -1038,10 +1038,7 @@
 	} else /* (role == R_SECONDARY) */ {
 		down(&resource->state_sem);
 		idr_for_each_entry(&resource->devices, device, vnr) {
-			bdev = bdgrab(device->vdisk->part0);
-			if (bdev)
-				fsync_bdev(bdev);
-			bdput(bdev);
+			fsync_bdev(bdev);
 			flush_workqueue(device->submit.wq);
 		}