diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index e44bf3c25718..cd78ebfefe52 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1734,14 +1734,15 @@ static bool need_peer_seq(struct drbd_conf *mdev) static void update_peer_seq(struct drbd_conf *mdev, unsigned int peer_seq) { - unsigned int old_peer_seq; + unsigned int newest_peer_seq; if (need_peer_seq(mdev)) { spin_lock(&mdev->peer_seq_lock); - old_peer_seq = mdev->peer_seq; - mdev->peer_seq = seq_max(mdev->peer_seq, peer_seq); + newest_peer_seq = seq_max(mdev->peer_seq, peer_seq); + mdev->peer_seq = newest_peer_seq; spin_unlock(&mdev->peer_seq_lock); - if (old_peer_seq != peer_seq) + /* wake up only if we actually changed mdev->peer_seq */ + if (peer_seq == newest_peer_seq) wake_up(&mdev->seq_wait); } }