diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index d5ad2434bb07..2558fd14126a 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1997,6 +1997,7 @@ retry_locked:
 	}
 
 	for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) {
+		int mflags = 0;
 		struct cap_msg_args arg;
 
 		cap = rb_entry(p, struct ceph_cap, ci_node);
@@ -2128,6 +2129,9 @@ ack:
 			flushing = ci->i_dirty_caps;
 			flush_tid = __mark_caps_flushing(inode, session, false,
 							 &oldest_flush_tid);
+			if (flags & CHECK_CAPS_FLUSH &&
+			    list_empty(&session->s_cap_dirty))
+				mflags |= CEPH_CLIENT_CAPS_SYNC;
 		} else {
 			flushing = 0;
 			flush_tid = 0;
@@ -2138,8 +2142,8 @@ ack:
 
 		mds = cap->mds;  /* remember mds, so we don't repeat */
 
-		__prep_cap(&arg, cap, CEPH_CAP_OP_UPDATE, 0, cap_used, want,
-			   retain, flushing, flush_tid, oldest_flush_tid);
+		__prep_cap(&arg, cap, CEPH_CAP_OP_UPDATE, mflags, cap_used,
+			   want, retain, flushing, flush_tid, oldest_flush_tid);
 		spin_unlock(&ci->i_ceph_lock);
 
 		__send_cap(mdsc, &arg, ci);