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=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 16814C433E0 for ; Tue, 23 Jun 2020 10:05:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF914206D4 for ; Tue, 23 Jun 2020 10:05:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732223AbgFWKFk (ORCPT ); Tue, 23 Jun 2020 06:05:40 -0400 Received: from relay6-d.mail.gandi.net ([217.70.183.198]:60465 "EHLO relay6-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732005AbgFWKFk (ORCPT ); Tue, 23 Jun 2020 06:05:40 -0400 X-Originating-IP: 93.34.118.233 Received: from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233]) (Authenticated sender: jacopo@jmondi.org) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id E04AAC000F; Tue, 23 Jun 2020 10:05:35 +0000 (UTC) From: Jacopo Mondi To: mchehab@kernel.org, sakari.ailus@linux.intel.com, hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com, roman.kovalivskyi@globallogic.com, dave.stevenson@raspberrypi.org, naush@raspberrypi.com Cc: Jacopo Mondi , mrodin@de.adit-jv.com, hugues.fruchet@st.com, mripard@kernel.org, aford173@gmail.com, sudipi@jp.adit-jv.com, andrew_gabbasov@mentor.com, erosca@de.adit-jv.com, linux-media@vger.kernel.org, libcamera-devel@lists.libcamera.org Subject: [PATCH 09/25] media: ov5647: Fix return value from read/write Date: Tue, 23 Jun 2020 12:07:59 +0200 Message-Id: <20200623100815.10674-10-jacopo@jmondi.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623100815.10674-1-jacopo@jmondi.org> References: <20200623100815.10674-1-jacopo@jmondi.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The ov5647_read()/ov5647_write() return in case of success the number of bytes read or written respectively. This requires callers to check if the return value is less than zero to detect an error. Unfortunately, in several places, callers directly return the result of a read/write call, causing issues when the returned valued is checked to be different from zero to detect an error. Fix this by returning zero if i2c_master_send() and i2c_master_read() return a positive value (the number of bytes written or read). Signed-off-by: Jacopo Mondi --- drivers/media/i2c/ov5647.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c index 61aa86e507b32..0c88f682de9b9 100644 --- a/drivers/media/i2c/ov5647.c +++ b/drivers/media/i2c/ov5647.c @@ -204,11 +204,13 @@ static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val) int ret; ret = i2c_master_send(client, data, 3); - if (ret < 0) + if (ret < 0) { dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n", __func__, reg); + return ret; + } - return ret; + return 0; } static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val) @@ -225,11 +227,13 @@ static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val) } ret = i2c_master_recv(client, val, 1); - if (ret < 0) + if (ret < 0) { dev_dbg(&client->dev, "%s: i2c read error, reg: %x\n", __func__, reg); + return ret; + } - return ret; + return 0; } static int ov5647_write_array(struct v4l2_subdev *sd, -- 2.27.0