From patchwork Mon Oct 15 00:24:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Rowand X-Patchwork-Id: 983837 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 42YKgM1vn7z9s7W for ; Mon, 15 Oct 2018 11:53:19 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="IbdZSPqR"; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 42YKgM0MgpzDrYf for ; Mon, 15 Oct 2018 11:53:19 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="IbdZSPqR"; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::641; helo=mail-pl1-x641.google.com; envelope-from=frowand.list@gmail.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="IbdZSPqR"; dkim-atps=neutral Received: from mail-pl1-x641.google.com (mail-pl1-x641.google.com [IPv6:2607:f8b0:4864:20::641]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 42YK450hb8zF0Vv for ; Mon, 15 Oct 2018 11:26:12 +1100 (AEDT) Received: by mail-pl1-x641.google.com with SMTP id y11-v6so8395827plt.3 for ; Sun, 14 Oct 2018 17:26:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=BwKhWXvi9uObifIA2caG7KxBnrbJ0SRY7Oj5Ow4g1sM=; b=IbdZSPqRTU12HVAPHQC4U1kmpBQ/wG7dpte77EPwS66x6e8kFeTncfdzvPTuAGU7J1 JtsvQDXItXJDfO7QBnceRhyyxDm7Y1LxQtK+TQ+MlS+z9Iafk8rDkv44qeORwZE4YwIE AAlKpJpIjxY9kbWSxyZ33822j2MVCqBhTOPsy3+6Xtk0jxO+jXp7uAo8nJHbduiRuM5S eTTsVtkeVoVilYKVoNFrGRPIix+27qVqMyOYbadmOVqVXplefpDodNy0CWfnVoVU6NtB cjXugPeUdfm4jShYIhwELZyBoDSlmWLma0bPKcDnRiNkkGMFaXD2Ge2qV0Vl576JB26p e9uA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=BwKhWXvi9uObifIA2caG7KxBnrbJ0SRY7Oj5Ow4g1sM=; b=Ql8pPLrteO/kH4W2rHX/EKhcCCZLy9ZQXxC9n6hvRIOokpa6F4WotT78xHix7lPVJK ZmOVmv5zj9SpQ2ssedKOt8mPyHNCSEaJ0Xs93jkoIckvxob/LHnpAbg2DTLZMrOrhjSf +WJxJscD9eqKmhvFp+CxqfkOo0Q6ePhmSf8tbf67Tgq4gNjnzqdhihP1FROcqAEl6Msy VCk/qOWi1ZLIuJOvd5ij64bRuba6dDxDmyz6R1Xj1Dl8YdVnaQRc5R3ggCU5TAs4y8RA 2TfQ9R2upYZm5lnwcyXGWQZNpiNc7aPPkH08KKAcVx3TzYfY6sNYm44WPrD8S4mKByc/ ktdw== X-Gm-Message-State: ABuFfoi4rdvsfj8IDmYsCuN/cd2woZ3C9Eax0UdGtSdpV7C6/VXAv5DM 3xsX1E5YdpEfvFzXuaoGKjA= X-Google-Smtp-Source: ACcGV62ywluIyp6JpHbWu/PeeqzKheUynLyUIcb7WKzM6BBqBdM2qDzXyzJKjBOd9MjYJYlS0/RJ5Q== X-Received: by 2002:a17:902:1129:: with SMTP id d38-v6mr9609107pla.270.1539563171237; Sun, 14 Oct 2018 17:26:11 -0700 (PDT) Received: from localhost.localdomain (c-24-6-192-50.hsd1.ca.comcast.net. [24.6.192.50]) by smtp.gmail.com with ESMTPSA id j14-v6sm11387110pgh.52.2018.10.14.17.26.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 14 Oct 2018 17:26:10 -0700 (PDT) From: frowand.list@gmail.com To: Rob Herring , Pantelis Antoniou , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Alan Tull , Moritz Fischer Subject: [PATCH v3 09/18] of: overlay: validate overlay properties #address-cells and #size-cells Date: Sun, 14 Oct 2018 17:24:21 -0700 Message-Id: <1539563070-12969-10-git-send-email-frowand.list@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1539563070-12969-1-git-send-email-frowand.list@gmail.com> References: <1539563070-12969-1-git-send-email-frowand.list@gmail.com> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-fpga@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Frank Rowand If overlay properties #address-cells or #size-cells are already in the live devicetree for any given node, then the values in the overlay must match the values in the live tree. If the properties are already in the live tree then there is no need to create a changeset entry to add them since they must have the same value. This reduces the memory used by the changeset and eliminates a possible memory leak. This is verified by 12 fewer warnings during the devicetree unittest, as the possible memory leak warnings about #address-cells and Signed-off-by: Frank Rowand --- drivers/of/overlay.c | 38 +++++++++++++++++++++++++++++++++++--- 1 file changed, 35 insertions(+), 3 deletions(-) diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 272a0d1a5e18..ee66651db553 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -287,7 +287,12 @@ static struct property *dup_and_fixup_symbol_prop( * @target may be either in the live devicetree or in a new subtree that * is contained in the changeset. * - * Some special properties are not updated (no error returned). + * Some special properties are not added or updated (no error returned): + * "name", "phandle", "linux,phandle". + * + * Properties "#address-cells" and "#size-cells" are not updated if they + * are already in the live tree, but if present in the live tree, the values + * in the overlay must match the values in the live tree. * * Update of property in symbols node is not allowed. * @@ -300,6 +305,7 @@ static int add_changeset_property(struct overlay_changeset *ovcs, { struct property *new_prop = NULL, *prop; int ret = 0; + bool check_for_non_overlay_node = false; if (!of_prop_cmp(overlay_prop->name, "name") || !of_prop_cmp(overlay_prop->name, "phandle") || @@ -322,13 +328,39 @@ static int add_changeset_property(struct overlay_changeset *ovcs, if (!new_prop) return -ENOMEM; - if (!prop) + if (!prop) { + + check_for_non_overlay_node = true; ret = of_changeset_add_property(&ovcs->cset, target->np, new_prop); - else + + } else if (!of_prop_cmp(prop->name, "#address-cells")) { + + if (prop->length != 4 || new_prop->length != 4 || + *(u32 *)prop->value != *(u32 *)new_prop->value) + pr_err("ERROR: overlay and/or live tree #address-cells invalid in node %pOF\n", + target->np); + + } else if (!of_prop_cmp(prop->name, "#size-cells")) { + + if (prop->length != 4 || new_prop->length != 4 || + *(u32 *)prop->value != *(u32 *)new_prop->value) + pr_err("ERROR: overlay and/or live tree #size-cells invalid in node %pOF\n", + target->np); + + } else { + + check_for_non_overlay_node = true; ret = of_changeset_update_property(&ovcs->cset, target->np, new_prop); + } + + if (check_for_non_overlay_node && + !of_node_check_flag(target->np, OF_OVERLAY)) + pr_err("WARNING: %s(), memory leak will occur if overlay removed. Property: %pOF/%s\n", + __func__, target->np, new_prop->name); + if (ret) { kfree(new_prop->name); kfree(new_prop->value);