gfs2: Revert "introduce qd_bh_get_or_undo"

The qd_bh_get_or_undo() helper introduced by that commit doesn't improve
the code much, so revert it and clean things up in a more useful way in
the next commit.

This reverts commit 7dbc6ae.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

Author: Andreas Gruenbacher

fs/gfs2/quota.c

@@ -491,20 +491,6 @@ static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
 	return 1;
 }
 
-static int qd_bh_get_or_undo(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
-{
-	int error;
-
-	error = bh_get(qd);
-	if (!error)
-		return 0;
-
-	clear_bit(QDF_LOCKED, &qd->qd_flags);
-	slot_put(qd);
-	qd_put(qd);
-	return error;
-}
-
 static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
 {
 	struct gfs2_quota_data *qd = NULL, *iter;
@@ -527,12 +513,17 @@ static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
 	spin_unlock(&qd_lock);
 
 	if (qd) {
-		error = qd_bh_get_or_undo(sdp, qd);
-		if (error)
+		error = bh_get(qd);
+		if (error) {
+			clear_bit(QDF_LOCKED, &qd->qd_flags);
+			slot_put(qd);
+			qd_put(qd);
 			return error;
-		*qdp = qd;
+		}
 	}
 
+	*qdp = qd;
+
 	return 0;
 }
 
@@ -1189,8 +1180,15 @@ void gfs2_quota_unlock(struct gfs2_inode *ip)
 		if (!found)
 			continue;
 
-		if (!qd_bh_get_or_undo(sdp, qd))
-			qda[count++] = qd;
+		gfs2_assert_warn(sdp, qd->qd_change_sync);
+		if (bh_get(qd)) {
+			clear_bit(QDF_LOCKED, &qd->qd_flags);
+			slot_put(qd);
+			qd_put(qd);
+			continue;
+		}
+
+		qda[count++] = qd;
 	}
 
 	if (count) {