From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0ED6C432C0 for ; Mon, 18 Nov 2019 11:25:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 773B82084D for ; Mon, 18 Nov 2019 11:25:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=rasmusvillemoes.dk header.i=@rasmusvillemoes.dk header.b="CcHL/wr1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727637AbfKRLZZ (ORCPT ); Mon, 18 Nov 2019 06:25:25 -0500 Received: from mail-wr1-f65.google.com ([209.85.221.65]:36014 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727351AbfKRLYR (ORCPT ); Mon, 18 Nov 2019 06:24:17 -0500 Received: by mail-wr1-f65.google.com with SMTP id r10so18998866wrx.3 for ; Mon, 18 Nov 2019 03:24:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rasmusvillemoes.dk; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=u8f4zkDbM2vRjhOU8bSiNRa1yRbCbXojjY2BLWPzI+4=; b=CcHL/wr1MdHVku5NXqYEh205MsV8nNbDhvOTjyrzGp7E05+OZTj+AZ65Mq6w5E7fC4 QUUsnYvwWfYNPoDOFKaiWLBxE8orb1Uaokk6+Yh/3Va8yKkEh4CwI3Bvmo4RGmqS5LuR 7JMzpGl4mSsJFAgOgGnawmUsoJc5NQxoI5Jzs= 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:mime-version:content-transfer-encoding; bh=u8f4zkDbM2vRjhOU8bSiNRa1yRbCbXojjY2BLWPzI+4=; b=nnpsYaT6EhLjMAkhZV2sRozI5g/NEAOeXZURlM2iFpKa8eRox4wvxwOZYgd2/k3r99 nVSmaJ7vwDeD8jjz2uCrhEHSqfxrAvAt2zsDUZVBZ8IF5C5ddQILnmh/e+v+o9i286xc L0XnmVwlt9cra6Dr2/TPnZZg7/R7FelZEaMvX1c39xTiHI4++1r71NCtaPlhn5kUt1J4 jZRnR6WpvOllDXjl60wqqowfw9bem/4a7QQxJkCJoOXHh98Dacl0siKSnW4ZoYqS2Rs/ uZgV1veqM6+du3zLrPBcne0qqtTdZhsC3DUF+YHseaX//2P4/oaj8OZoC8600YRM9rTr X2FQ== X-Gm-Message-State: APjAAAVrORnlWAtZkj5RGcFUymdvvLKuHS7TlXrU9Mf6/AI0GTZKJ60G 3LSbTO2bvCO4S8l/4uZSHWNOKg== X-Google-Smtp-Source: APXvYqxiVIfcvMPElvIDiGYFueIrSfkJiIqk8i4Ft8HAmwqiGb21aiYg0hu8lk7xe2G5zIrvZe7G8Q== X-Received: by 2002:a5d:4e89:: with SMTP id e9mr31691608wru.342.1574076255340; Mon, 18 Nov 2019 03:24:15 -0800 (PST) Received: from prevas-ravi.prevas.se (ip-5-186-115-54.cgn.fibianet.dk. [5.186.115.54]) by smtp.gmail.com with ESMTPSA id y2sm21140815wmy.2.2019.11.18.03.24.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Nov 2019 03:24:14 -0800 (PST) From: Rasmus Villemoes To: Qiang Zhao , Li Yang , Christophe Leroy Cc: linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Scott Wood , Timur Tabi , Rasmus Villemoes , linux-serial@vger.kernel.org Subject: [PATCH v5 33/48] serial: ucc_uart: limit brg-frequency workaround to PPC32 Date: Mon, 18 Nov 2019 12:23:09 +0100 Message-Id: <20191118112324.22725-34-linux@rasmusvillemoes.dk> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191118112324.22725-1-linux@rasmusvillemoes.dk> References: <20191118112324.22725-1-linux@rasmusvillemoes.dk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org According to Timur Tabi This bug in older U-Boots is definitely PowerPC-specific So before allowing this driver to be built for platforms other than PPC32, make sure that we don't accept malformed device trees on those other platforms. Suggested-by: Timur Tabi Signed-off-by: Rasmus Villemoes --- drivers/tty/serial/ucc_uart.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index c055abf4c919..9436b93d5cfa 100644 --- a/drivers/tty/serial/ucc_uart.c +++ b/drivers/tty/serial/ucc_uart.c @@ -1392,6 +1392,13 @@ static int ucc_uart_probe(struct platform_device *ofdev) if (val) qe_port->port.uartclk = val; else { + if (!IS_ENABLED(CONFIG_PPC32)) { + dev_err(&ofdev->dev, + "invalid brg-frequency in device tree\n"); + ret = -EINVAL; + goto out_np; + } + /* * Older versions of U-Boot do not initialize the brg-frequency * property, so in this case we assume the BRG frequency is -- 2.23.0