From patchwork Mon Dec 28 12:48:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 354279 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 5FEA1C433E9 for ; Mon, 28 Dec 2020 16:35:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2CEDF221F0 for ; Mon, 28 Dec 2020 16:35:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731002AbgL1QfE (ORCPT ); Mon, 28 Dec 2020 11:35:04 -0500 Received: from mail.kernel.org ([198.145.29.99]:58372 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729999AbgL1NCM (ORCPT ); Mon, 28 Dec 2020 08:02:12 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id BF7E622AAA; Mon, 28 Dec 2020 13:01:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609160491; bh=fmP7GaXeMEkM7Sf25bDFeA59vczjwB2f6e4UvA/ItfQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oI6kZAi1BEekDfYzld7vRnH8ruFqybjSoDbredA88PKDbmC6Vowb0FftlrxChVCO6 +Z/7oCdfuwUpLuvy6z+L6GDpbEFjjc2NDbpN+ZtAN1R5V905BeysSQtQJt/vj70G1B 1v6p6mj9MmfmDEQhQgIgjzDM+hcqMN+cjR6srpi8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Torokhov , Sasha Levin Subject: [PATCH 4.9 070/175] Input: ads7846 - fix unaligned access on 7845 Date: Mon, 28 Dec 2020 13:48:43 +0100 Message-Id: <20201228124856.637983927@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228124853.216621466@linuxfoundation.org> References: <20201228124853.216621466@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dmitry Torokhov [ Upstream commit 03e2c9c782f721b661a0e42b1b58f394b5298544 ] req->sample[1] is not naturally aligned at word boundary, and therefore we should use get_unaligned_be16() when accessing it. Fixes: 3eac5c7e44f3 ("Input: ads7846 - extend the driver for ads7845 controller support") Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin --- drivers/input/touchscreen/ads7846.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 9fa7ae12df80a..b77a2178fdec4 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -35,6 +35,7 @@ #include #include #include +#include /* * This code has been heavily tested on a Nokia 770, and lightly @@ -410,7 +411,7 @@ static int ads7845_read12_ser(struct device *dev, unsigned command) if (status == 0) { /* BE12 value, then padding */ - status = be16_to_cpu(*((u16 *)&req->sample[1])); + status = get_unaligned_be16(&req->sample[1]); status = status >> 3; status &= 0x0fff; }